GrimmSpeed Up-Pipe (Subaru)

The entire Grimmspeed Up-Pipe is made of 304 SS (flanges, flex, tubing) and has a pipe-wall thickness of 14 Gauge, this is the most "heavy-duty" pipe you will find.



GrimmSpeed was founded in 2006 to provide customers with innovative and highly engineered aftermarket products. On a more personal level, we are a group car enthusiasts who are working our passions in the lovely city of Minneapolis, Minnesota. Our bread and butter started out anything Subaru. However, after growing our team and engineering expertise, we started developing products for Mitsubishi, Ford, MazdaSpeed, and Hyundai markets. We are a true garage start-up (single stall townhouse garage in Maplewood, Minnesota) and we've been lucky enough over the years to be able to turn it into exactly the business we had dreamed....actually, much more. We have a wide breadth of product offerings including; intercoolers, exhausts, intakes, gaskets, engine pulleys, phenolic spacers, boost controllers, and many more.

The inlet size is 1.92" and the pipe tapers down to 1.72 which acts as a funnel as it moves into the turbo allowing for the smoothest transition and best air-flow quality. The one of a kind Triple Layer Flex Joint used by Grimmspeed is not located in the bend, which adds to the life expectancy of the flex section. The outlet size is a perfect match to the most common stock location turbos allowing for a smooth transition into the turbo.


Flow Bench Results vs. OEM

  • OEM Catless - 244.6 CFM
  • OEM Catted - 164.7 CFM
  • GrimmSpeed - 292.6 CFM



  • TRIPLE LAYER Quality Flex Joint - Gives you extra durability compared to competitors single and double layer flex joints. Flow through Flex - There are no big steps in the flow path of the flex joint. Grimmspeeds flex joint is not located on a bend so there is very minimal flow loss(if any) through the flex
  • 14 Gauge Piping Thickness - almost all pipes on the market use 16-18(~1.5mm) thick piping wall, but not Grimmspeed. Grimmspeed uses a 2mm thick piping wall(33% thicker than all of the competition!)
  • Pipe to Flange Connection - Much smoother connection. Piping is ported flush with flange so there is no step into the pipe
  • 1.92" Inlet = Perfect match to gasket allowing a little room for gasket movement(anything bigger, ie 2", will almost be guaranteed to put the gasket in the flow which is horrible for flow)
  • 1.75" Outlet = Narrowing down from 1.92 to 1.75 acts as a funnel. Also very close match to most common turbos so you have much less step going into the turbo(unlike a straight through 2" which creates a huge step going into most common turbos vf's, tdo4s, etc)
  • Massive 304SS flanges
  • Minimal internal steps for maximum flow
  • Complete 304SS Construction (pipe, flex section, flanges)
  • Reduce turbo lag


Vehicle Fitment

  • 2006 - 2014 Subaru WRX
  • 2004- 2014 Subaru STI
  • 2007 - 2009 Subaru Legacy GT
  • 2006 - 2010 Subaru Forester XT

warning_symbolWARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

More Information
SKU GRM00300
Product Type Intake and Exhaust
Intake and Exhaust Exhaust
Brand GrimmSpeed
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