Flatirons Tuning


	2009+ STI EJ257 Shortblock with Nitride Treated Crankshaft
	In Stock and Ready to SHIP! This is a brand new, completely assembled short-block directly from Subaru. (read more...)
	Regular Price: $2,145.57 On Sale For: $1,870.00	Quantity:

	STI EJ257 Shortblock
	In Stock and Ready to SHIP! This is still the same brand new Subaru OEM block as before, just at a lower price! (read more...)
	Regular Price: $2,063.57 On Sale For: $1,799.00	Quantity:

	Cosworth - Subaru EJ257 High Performance Short Block Assemblies
	For a limited time, we are now offering FREE SHIPPING on Cosworth Engine's! Cosworth EJ25 (STI) short block has gone through countless hours of dyno evaluation to determine the best combination of par... (read more...)
	Regular Price: $5,562.00 On Sale For: $5,284.00	Quantity:

	Cosworth High Performance STi EJ257 Long Block Assemblies
	We are now offering FREE SHIPPING on Cosworth parts! After several years of testing and development, the Cosworth High Performance Subaru EJ25 long block has arrived. The CS600 series is designed for extreme track day use and the demanding performance enthusiast. Each assembly is precision built by one of Cosworth's skilled craftsmen using the finest components from their parts catal... (read more...)
	Regular Price: $12,359.00 On Sale For: $11,742.00	Quantity:

	Crawford High Performance Short Block Assemblies
	Crawford's reputation as an elite Subaru engine builder has continued to grow with the release of several new options from them in long and short block assemblies. These are assembled to Crawford's exacting specifications, and are serialized, so you know and can prove that you have the real deal! There are several variations of these Short Block Assemblies. If you are not sure what you nee... (read more...)
	Price: $3,999.95	Quantity:

	Crawford Performance High Performance Long-Block Assemblies
	Crawford's reputation as an elite Subaru engine builder has continued to grow with the release of several new options from them in long and short block assemblies. These are assembled to Crawford's exacting specifications, and are serialized, so you know and can prove that you have the real deal! There are several variations of these Long Block Assemblies. If you are not sure what you need, or if your... (read more...)
	Price: $9,569.95	Quantity:

	Cosworth CNC Ported Big Valve Cylinder Head Assemblies for STi EJ257
	For a limited time, we are offering FREE SHIPPING on Cosworth Big-Bore Cylinder Heads! Cosworth CNC ported cylinder heads feature dyno tested and flow bench proven ports, engineered for maximum real world power. Each new cylinder head is ported on a 5 axis machine to ensure consistency and perfect port shape every time. Additionally, larger in... (read more...)
	Regular Price: $4,222.00 On Sale For: $4,011.00	Quantity:

	Crawford Performance Race Prepped STi Cylinder Heads
	Crawford's professionally hand ported high power cylinder heads come complete with a performance valve job, valve springs, and titanium retainers. Crawford's heads limit the recommended maximum RPM to 8500, designed for faster spooling characteristics and less frictional loss c... (read more...)
	Price: $4,400.00	Quantity:

	Cosworth - EJ205/EJ257 Timing Belt Guide
	This item now has FREE SHIPPING! Cosworth's Timing Belt Guide replaces the factory sheet metal timing belt guide to help reduce the possibility of the timing belt skipping a tooth during high rpm use. The original sheet metal timing belt guide can flex from belt deflection when subjected to extreme RPMs causing the timing belt to skip one or more teeth on th... (read more...)
	Regular Price: $79.00 On Sale For: $76.00	Quantity:

	Cosworth Forged Pistons for Subaru STi EJ257
	We now offer FREE SHIPPING on this item! The piston is one of the most important components within the engine. It can be subjected to directional change up to 285 times every second and must withstand acceleration forces of 8500g. (read more...)
	Regular Price: $799.00 On Sale For: $760.00	Quantity:

	Cosworth High RPM Single Valve Spring Set (x16) for EJ205/EJ257
	We now offer FREE SHIPPING on this item! (read more...)
	Regular Price: $325.00 On Sale For: $309.00	Quantity:

	Cosworth Main and Rod Bearings
	We now offer FREE SHIPPING on these items! Engine bearings are one of the most vital... (read more...)
	Regular Price: $116.00 On Sale For: $111.00	Quantity:

	Cosworth Oil Control Baffle Plate
	We currently offer FREE SHIPPING on this item! (read more...)
	Regular Price: $325.00 On Sale For: $309.00	Quantity:

	ARP Head Studs for the WRX and STI
	It is for good reason that virtually every top professional engine builder relies on ARP Pro Series Head studs for their all-out competition engines. Simply stated, there's not a better stud on the market today. ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. The ever-popular 8740 chromoly steel, for example, comes from the mill in four distinct grades. The lowest is “commercial,” w... (read more...)
	Regular Price: $323.41 On Sale For: $192.65	Quantity:

	Subaru OEM Head Studs for Turbo EJ Series Engines
	These are the Origional Subaru Head Studs used in the EJ Series Turbo Engine's. These will fit the 2002+ USDM WRX, 2004+ STI, 2004+ Forester XT, and 2005+ Legacy GT. We sell them either individually, or as a set. The Subaru Part # for these is 11095AA042, and you would need 12 for a complete set, 6 for each side. ... (read more...)
	Price: $10.58	Quantity:

	Cobb Access Port 2.0
	New Pricing! In STOCK and ready to ship TODAY! (read more...)
	Regular Price: $695.00 On Sale For: $595.00	Quantity:

	Cobb Access Port for the 2008+ Subaru's
	(read more...)
	Price: $595.00	Quantity:

	Cobb Forester XT Stage 1
	Back in stock and ready to ship today! (read more...)
		Quantity:

	Cobb Forester XT Stage Two Power Package
	Cobb Forester XT Stage Two Power Package With Cobb's Stage 2 package, the Forester XT is transformed into a torque monster will full boost capable as low as 2500 RPM. Overall drivability is greatly improved and power delivery is significantly smoother. Cobb's Stage 2 power package includes their popular Turboback exhaust system featuring a subtle exhaust tone that doesn't get too loud or drone inside the cabin -- all while remai... (read more...)
	Price: $1,895.00

	Deatschwerks Injectors 565cc-1000cc
	These are the same injectors demanded by many of the most discriminating Subaru tuners including Cobb. Each set is individually tested and flow balanced in-house to within a 1-2% variance. The results are included in your custom flow report that accompanies every set of DW injectors. There flow report also includes additional set-specific data useful for tuning. DW STi injectors also feature: (read more...)
	Price: $369.99	Quantity:

	Walbro 255LPH Fuel Pump with Installation Kit
	This Walbro Fuel pump is a direct replacement for your factory fuel pump, and comes with all the required parts for installation and instructions. It flows 255Liters per Hour, which is much more than the OEM pump, and is a essential if you are running larger injectors to maintain consistent fuel pressure. (read more...)
	Price: $102.99	Quantity:

	2008 USDM STi 11mm Oil Pump - Kit
	In Stock and Ready To Ship! This pump comes on the 2008 STI. Because of the AVCS on both the Intake and Exhaust cam's, Subaru improved the design of t... (read more...)
	Regular Price: $154.95 On Sale For: $139.95	Quantity:

	Cosworth 10mm Blueprinted Oil Pump Kit
	We now offer FREE SHIPPING on this product! High performance engines require additional oil pressure because of the increase... (read more...)
	Regular Price: $355.00 On Sale For: $338.00	Quantity:

	Cosworth 11mm Blueprinted Oil Pump Kit
	Now with free shipping in the continental USA! To produce this pump, Cosworth starts with the improved 11mm oil pump that comes standard in the 2008+ STi. This pump is the same pump used in the JDM / EDM STi's, which are rev-limited at 8k RPMs. This pump is also available on our website in unmodified OEM form. Cosworth then increases the spring tension in the pres... (read more...)
	Regular Price: $375.00 On Sale For: $357.00	Quantity:

	Cosworth 12mm High Pressure Blueprinted Oil Pump Kit
	We now offer FREE SHIPPING on this item! Increasing oil volume will he... (read more...)
	Regular Price: $539.00 On Sale For: $513.00	Quantity:

	JDM Subaru 12mm Oil Pump - Kit
	In Stock and Ready To Ship For: Subaru EJ20 & EJ25. This pump flows 20% more volume, while maintaining the factory USDM STI peak oil pressure. It is great for high RPM use where your original factory oil pump could not keep up with the needed oil output to properly lubricate your engines internal components. Factory Subaru engines sometimes lack the necessary oil... (read more...)
	Regular Price: $265.00 On Sale For: $240.00	Quantity:

	Cosworth EJ20/EJ255/EJ257 Kevlar Timing Belt
	We are currently offering FREE ground shipping on this item! Cosworth Kevlar High Performance Timing belts are 300% stronger than original equipment timing belts and are the perfect compliment when installing Cosworth camshafts or cylinder heads. Engineered with the following features: (read more...)
	Regular Price: $265.00 On Sale For: $252.00	Quantity:

	Subaru OEM Timing Belt for the WRX, STI, Legacy GT
	Subaru requires the Timing Belt to be replaced at 105,000 miles. We recommend replacing the timing belt at or around 90,000 miles because when this is done, it allows the mechanic to inspect many different critical engine components includ... (read more...)
	Regular Price: $149.95 On Sale For: $119.99	Quantity:

	Subaru OEM Timing Belt Tensioner Assembly
	This is a Brand New OEM Subaru Hydraulic Timing Belt Tensioner. It will fit most all EJ series engines, including the 2002+ WRX, 2004+ STI, 2005+ Legacy GT, and 2004+ Forester XT. These ca... (read more...)
	Regular Price: $149.99 On Sale For: $112.46	Quantity:

	Cosworth High Performance Head Gaskets for STi EJ257
	We now offer FREE SHIPPING on this item. Cosworth High Performance Head Gaskets are engineered to seal in power under the most demanding conditions. Constructed from stainless steel with a folded stopper layer, each application features superior sealing compared to conventional multi layer steel gaskets. Additionally, Cosworth High Performance Head Gaskets are manu... (read more...)
	Regular Price: $200.00 On Sale For: $190.00	Quantity:

	Denso Iridium Plugs for STI, 05 Legacy GT, and Forester XT (OEM Temp & 1 step colder)
	The Denso Iridium spark plug is a new generation of high-performance spark plug that uses the world’s smallest Iridium electrode that is a mere 0.4 mm in diameter. The smaller electrode is able to concentrate the electric potential at the electrode resulting in a stronger electric field. (read more...)
	Regular Price: $60.00 On Sale For: $48.00	Quantity:

	NGK Iridium Plugs for the STI, 2006+ WRX, Forester XT, and Legacy GT (OEM & 1 Step Colder)
	The benefits of NGK Iridium plugs are: - Longer Life - Improved ignition efficiency (read more...)
	Price: $32.99	Quantity:

	Subaru OEM Sparkplugs for 04+ 2.5 Liter Turbo's
	This is a set of 4 OEM Subaru Sparkplugs for the 2004+ 2.5 Liter Turbo Engine. They are platinum plugs, so they have a service interval of 60,000 miles. These are also the OEM temperature plugs. There are two differen't plugs, so please make sure that you are ordering the correct set for the year of your car. The Subaru Part # for the 2004 - 2007 WRX and STI is 22401AA630 The Subaru Part # for the 2005 - 2009 Legacy GT is 22401AA670... (read more...)
	Regular Price: $59.80 On Sale For: $47.84	Quantity:

	Subaru Oil Filter's
	These are Genuine Subaru Oil Filter's and Crush Washer's. Why take a chance on an aftermarket filter, when you can put on the filter that came on your car from a factory. They will fit all Turbo Subaru's made from 2002 - 2009. ... (read more...)
	Price: $9.75	Quantity:

	Rear Engine Re-Seal Kit for Subaru
	If you are doing a clutch and flywheel installation, we recommend re-sealing the back side of the motor while you have access. If you are a low mileage car this may not be necessary, but for most applications, it is good peace of mind. This kit includes everything you need to reseal the whole back side of the motor, which you have access to during that installation. The parts are also available individually below the kit.... (read more...)
	Regular Price: $52.52 On Sale For: $39.71	Quantity:

	Subaru Galley Plug with Sensor Bung
	This is a galley plug that has a threaded bung that can be used for an oil pressure sensor for aftermarket gauges, etc. This galley plug will replace a plug that is on the back of most all EJ series engines. The Subaru Part # for this part is 11024AA210. ... (read more...)
	Regular Price: $9.17 On Sale For: $7.34	Quantity:

	Subaru Engine Block Heater
	Designed for easier cold weather engine starting. Also recommended is the Battery Warmer. 400-watt, 115-volt heater. This Block Heater will fit most Subaru's up to 2009, including the 02 - 09 WRX, 04 - 09 STI, and 05 - 09 Legacy GT & Outback. If you are not sure if this will fit your car, please call or e-mail us before ordering. The Subaru Part # for this Block Heater is A0910AS100 ... (read more...)
	Regular Price: $49.34 On Sale For: $31.96	Quantity:

	GrimmSpeed Thermostat 160 Degree - Subaru
	First rule of thumb, excess heat kills engines and power. GrimmSpeed is on your side with their new 160 Degree Thermostat. Their thermostat will make an immediate and direct impact on your engine running temps. The GrimmSpeed 160 Degree Thermostat will bring your engine coolant temps down 20-30 Degrees. Many OEM style T-Stats can have a very negative effect on your vehicle, if they fail, they fail closed and you... (read more...)
	Price: $49.99	Quantity:

	Mishimoto Cooler Thermostat (60* C)
	The Mishimoto racing thermostat for the 2001+ Subaru Impreza WRX and STI will promote greater cooling efficiency throughout your engine. The Mishimoto racing thermostat will significantly lower high engine temperature produced by modified and upgraded turbo applications. Once the engine is fully warmed up the Mishimoto racing thermostat will open up at a lower temperature than standard thermostats, also allowing the coolant... (read more...)
	Regular Price: $60.00 On Sale For: $52.00	Quantity:

	Subaru OEM Thermostat Kit
	This is a brand NEW OEM Subaru thermostat and thermostat gasket. Subaru Part #'s 21200AA072 & 21236AA010 ... (read more...)
	Regular Price: $19.38 On Sale For: $15.50	Quantity:

	Skunk2 Radiator Cap
	Currently, We are offering Free Ground Shipping on All Skunk2 products The Skunk2 Radiator Cap increases internal radiator pressure, thus physically raising the coolant boiling point and increasing cooling efficiency. The o... (read more...)
	Regular Price: $30.00 On Sale For: $29.99	Quantity:

	GTSPEC Water Temperature Relocator/Adapter
	Relocates your water temperature sensor outside of the engine for aftermarket sensors and better readings. This goes in line with the radiator hose on your vehicle. Please measure your hose size to ensure you get the correct size adapter. Available in 32mm and 38mm sizes. ... (read more...)
	Regular Price: $28.00 On Sale For: $25.20	Quantity:

	Redline Water Wetter
	Water Wetter is a unique wetting agent for cooling systems which reduces coolant temperatures by as much as 30ºF. This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol-based antifreeze. Or it can be added to new or used antifreeze to improve the heat transfer of ethylene and propylene glyco... (read more...)
	Regular Price: $8.95 On Sale For: $7.50	Quantity:

	GTSPEC Oil Sensor Block Sandwich Adaptor
	Oil sandwich adapter with 2x sensor fittings. M20 -- Fits Most Honda/Subaru/Mitsubishi M19 -- Fits most Nissan/Toyota Fitment for 1/8 PT or 1/8 NPT sensor. ... (read more...)
	Regular Price: $68.00 On Sale For: $61.20	Quantity:

	Kartboy Engine Pitch-Stop Mount
	Now with FREE SHIPPING! Kartboy has designed this Engine Pitch Stop Mount to replace the OEM Pitch Stop Mount on all Turbo Subaru's from 2002 on. This piece is made from billet aluminum, and has polyurethane bushings to c... (read more...)
	Price: $125.00	Quantity:

	STI Hardened Group-N Engine and Transmission Mounts
	These Engine and Transmission mounts are made by Subaru Technica International to replace the stock parts. They are made using stiffer rubber and plastic to reduce movement of the engine and transmission under hard acceleration and braking. These a... (read more...)
	Regular Price: $260.96 On Sale For: $215.00	Quantity:

	Aeroquip Firesleeve
	Fire Sleeve is ideal in protecting against intense under hood heat making it the perfect solution for protecting hoses, oil and fuel lines and electrical wiring. Constructed of a woven insulated fiberglass braided sleeve heavily coated with 100% iron oxide silicone rubber, Fire Sleeve is capable of insulating and withstanding temperatures up to 500°F continuous and up to 2000°F intermittent. Fire Sleeve can be use... (read more...)
	Price: $10.70	Quantity:

	Cobb Lightweight Main Power Pulley
	We Now Offer Free Shipping On All COBB Parts!!!!!!!!!! COBB is proud to announce the availability of the new COBB Lightweight Main Power Pulley kits for all Subaru EJ20 and EJ25 models. (read more...)
	Price: $135.00	Quantity:

	Perrin Crank Pulley
	Weight reduction is key to making the best use of any available HP and torque. In no place on our vehicle is this more important than the rotating mass found in the engine. The PERRIN PerformanceTM Crank Pulley is 4-pounds lighter than the stock crank pulley. This reduction is equal to removing more than 100 lbs of vehicle weight! Throttle response, horsepower and torque are all increased with this easy to install product! ... (read more...)
	Regular Price: $134.99 On Sale For: $107.99	Quantity:

	Kartboy Battery Tie-Down
	Now with FREE SHIPPING! This Kartboy Battery Tie-Down Fits all Subaru Models. It is made of lightweight Aluminum and has recessed cut in it to fit the Kartboy Logo. The Kartboy part # for this part is KB-BATT ... (read more...)
	Price: $35.00	Quantity:

	Cobb Billet Battery Tie Downs
	CAD designed and CNC machined from billet 6061-T6 and hard anodized for a long lasting finish. Directly replaces the factory battery tie down. Applications: 2002-2005 Subaru Impreza WRX (read more...)
	Price: $35.00	Quantity:

	Samco WRX, STI, Forester XT Silicone Radiator Hoses
	Improve the look of your engine bay with these top quality Samco Sport Silicone hoses. These hoses are designed to withstand much higher temperatures, and higher pressures than the stock rubber hoses. They will also resist dry rotting and last much longer than a rubber hose. A nice finishing touch for your engine bay as well! (read more...)
	Regular Price: $149.00 On Sale For: $114.99	Quantity:

	Perrin Turbo Inlet Hose for WRX & STI
	In Stock and Ready to Ship! A major built in flaw from Subaru is the wimpy turbo inlet tube. Made from weak plastic and corrugated rubber to, it's a recipe to fail! And fail they have. A recent inspection of the Perrin 2... (read more...)
	Regular Price: $229.99 On Sale For: $205.00	Quantity:

	Turbosmart Straight Cut Silicone Hose - 3 Feet
	Why use Silicone Hoses? Silicone hoses are stronger, tougher and more flexible than ordinary rubber hoses. Turbosmart Silicone Hoses are manufactured from a high-grade silicone and offer superior temperature resistance which makes them ideal for cooling/heating and charged-air applications. They will last longer, perform better and will not deform under extreme conditions. An inexpensive and practical performance modification for all types of ... (read more...)
	Price: $31.95	Quantity:

	Turbosmart Straight Cut Silicone Hose - Short
	Why use Silicone Hoses? Silicone hoses are stronger, tougher and more flexible than ordinary rubber hoses. Turbosmart Silicone Hoses are manufactured from a high-grade silicone and offer superior temperature resistance which makes them ideal for cooling/heating and charged-air applications. They will last longer, perform better and will not deform under extreme conditions. An inexpensive and practical performance modification for all types of ... (read more...)
	Price: $7.95	Quantity:

	Turbosmart Vacuum Hose (10 feet)
	Why use Silicone Hoses? Silicone hoses are stronger, tougher and more flexible than ordinary rubber hoses. Turbosmart Silicone Hoses are manufactured from a high-grade silicone and offer superior temperature resistance which makes them ideal for cooling/heating and charged-air applications. They will last longer, perform better and will not deform under extreme conditions. An inexpensive and practical performance modification for ... (read more...)
	Price: $15.95	Quantity:

	Turbosmart Murray Constant Tension Hose Clamps
	MURRAY Constant Tension CLAMPS A constant tension stainless steel worm gear clamp designed to compensate for the effects of thermal cycling and/or compression set of hose. The Murray Clamps' spring action outer-band solves this problem and features a unique innerband profile to provide superior sealing pressure via its two raised ribs and the chamfered edges eliminate damage to the hose when tightened. Please Note: T... (read more...)
	Price: $12.95	Quantity:

	Universal Cusco Oil Catch Can
	It is normal for a turbocharged or supercharged car to build up pressure in its crankcase due to “blow-by”. In order to relieve this pressure, auto manufactures have designed a PCV, or “Positive Crankcase Ventilation” system. (read more...)
	Price: $105.00	Quantity:

	ENEOS 0W-50 Synthetic Motor Oil
	100% Synthetic Ultra Wide Range Motor Oil (Racing grade / API SM 0W-50) ENEOS is the #1 oil in Japan, and is now available in America! (read more...)
	Price: $82.42	Quantity:

	ENEOS 5W-30 Synthetic Oil
	Multigrade Gasoline Engine Oil (API SM/ILSAC GF-4 5W-30) ENEOS is the #1 oil in Japan, and is now available in America!<... (read more...)
	Price: $42.00	Quantity:

	ENEOS 5W-40 Synthetic Oil
	Motor Oil for Both Gasoline and Diesel Vehicles (API SM/CF / ACEA A3/B3 5W-40) (read more...)
	Price: $54.00	Quantity:

	Redline 10w30 Synthetic Oil
	10W30 is the best all-weather viscosity grade for gasoline engines in cars and light trucks that are driven on the street on a daily basis. Reduces turbo lag and provides more power and economy while providing thicker bearing oil films at operating temperature than a petroleum 10W-40. Best all-round, synthetic oil for stock or slightly modified engines in high- performance cars that are street-driven. Best choice to repla... (read more...)
	Regular Price: $10.00 On Sale For: $9.25	Quantity:

	Redline 30WT Race Oil
	This is Redline's 30WT Racing Oil. These oils are designed for racing applications only and not intended for street use. Reformulated for improved frictional properties Special detergents for improved lubricity and less detonation Polyol ester base stocks provide more stability and fil... (read more...)
	Regular Price: $11.95 On Sale For: $8.49	Quantity:

	Redline 5w30 Synthetic Oil
	Provides the quickest starts and fastest oil pressure rise. Will reduce turbo lag and provides more power and best economy in an engine in good condition. Replacement for OE factory-fill oils in passenger cars and most light trucks, including most new GM cars and trucks. Thicker oil film at operating temperature than a petroleum 10W-40. Best choice for engines operated in extreme cold weather. ... (read more...)
	Regular Price: $120.00 On Sale For: $111.00	Quantity:

	Red Line Assembly Lube 4oz
	Red Line Assembly Lube 4oz -Three times greater film-strength than conventional black molybdenum Disulfide lubricants. -Can be used safely with all metals, including bearings. -Provides excellent rust and corrosion protection. -Can be used with petroleum or synthetic oils. -Excellent cling and does not plug filters. ... (read more...)
	Price: $7.00

	Red Line CV-2 14oz Tub
	Red Line CV-2 14oz Tub Synthetic High-Performance Extreme Pressure Grease Provides load-carrying anti-wear protection which is far superior to black molybdenum disulfide greases. (read more...)
	Price: $9.75

	Redline CV-2 14oz Tube
	Redline CV-2 14oz Grease Gun Tube Synthetic High-Performance Extreme Pressure Grease Provides load-carrying anti-wear protection which is far superior to black molybdenum disulfide greases. (read more...)
	Price: $9.75

	Gizzmo Thermal Gaskets for EJ Series Engines
	The Gizzmo Thermal Gasket, also known as a phenolic gasket, greatly reduces heat transfer from the engine block into the inlet manifold. Stopping this heat transfer results in a cooler inlet air temperature, and in doing so increases your engine power in much the same way as an intercooler does. (read more...)
	Price: $84.99	Quantity:

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Why use Silicone Hoses?

Why use Silicone Hoses?

Why use Silicone Hoses?

MURRAY Constant Tension CLAMPS