This is the original engine designed by Crawford Performance that firmly established CP as the leader in Subaru four cylinder performance engines. These engines were meticulously designed and assembled for the Gumball 3000 DC Shoes Subaru's. As its name implies, the Gumball 3000 takes place over 3,000 fast and grueling miles. The Crawford Performance S2 Long Block took it all in stride, proving itself to bulletproof from start to finish. 

The Street-Prepped heads have been daily driven to and from the race track and then proven on the race track for ultimate performance. Designed to give you the potential from various short block options without sacrificing drivability around town and in traffic.

The next level of street performance is the S3L – Street Block designated originally in order to withstand Sport Compact Car’s most grueling challenge, the Ultimate Street Car Challenge. Not only did this block make more power than any previous Subaru during this competition, it also took second place at the drag strip while finishing 2nd overall.

Each long block is professionally balanced and assembled in a clean room environment in order to create the most reliable engines available on the market. While these blocks are able to withstand the horrors of the Ultimate Street Car Challenge, they can also be driven to and from the race track with rock-solid reliability and drivability.

While the balanced block can rev very high, adapting long rod ratios to the block has allowed the high revving engine to rev even more effortlessly, especially at stratospheric RPM. This, in turn, has pushed this engine setup to be one of the fastest 2.5-liter turbo blocks on the market.

The Street-Prepped heads have been daily driven to and from the race track and then proven on the race track for ultimate performance. Designed to give you the potential from various short block options without sacrificing drivability around town and in traffic..

S3L – Race Short Block:
- New 2.5-Liter Semi-Closed Turbo Block
- New Subaru STI Forged Crank
- New STI High Performance High Mileage Piston Rings
- CP-Designed Forged and Strengthened Long Rods
- CP-Designed Forged Pistons
- CP-Designed Case Hardened and Heat Treated Wrist Pins
- Professionally Balanced and Assembled

Installation Kit
- New Subaru STI 3-Layer Stainless Steel Head Gaskets
- New Subaru STI High-Flow Oil Pump
- New Subaru STI Exhaust Gaskets
- New Subaru STI Intake Gaskets
- New One Step Colder NGK Iridium Spark Plugs
- CP-Designed ARP High Performance Head Studs

Street-Prepped Heads
- Stainless Steel Intake Valves
- Lightweight Sodium Filled Exhaust Valves
- Steel Retainers and High Performance Valve Springs

With the introduction of the new and improved version of the 84mm billet crank (lighter and stronger than before) Crawford has re-badged this block as a 2.7 liter engine. To prove the potential, with a wider power band (more area under the curve) and more torque they competed at the 2009 Modified Magazine Shootout. Down over 60 whp to the closests competitors engine, Crawford set a new track record and won the Time Attack.

The world’s largest commercially available displacement STI stroked block with an 84mm crank, 3 mm larger than the nearest competitor.

Where some engines might be able to make full boost at 100+ RPM's faster than stock, we not only improve upon that by 300 RPM's more (therefore 400+ RPM's faster than stock) but also offer a lightning quick throttle response and boost response. Offering a broader power band and more low end torque this is what will give you the edge, wins races and even gives you that kick in the pants feel when driving the car around town.

Crawford Performance billet cranks are the center piece of these masterpieces. While these engines can outperform any Subaru 2.5-liter engine based on shear displacement, the precise design and professional balance and assembly is what establishes the bar above all others. Vastly improved throttle response, Crawford-guaranteed faster turbo spooling, and massive power gains have made this package almost unbeatable time and time again.

The Race Prepped Heads are a true race bred system, proving itself with over 16 race track wins within a 1 year time span. These race proven heads have sustained high RPM loads at the race track or drag strip and even set horsepower records on the OEM ECU with I-Speed USA tuning. There are not many race heads that can set fast times while handling the abuse dished out Crawford Performance drivers and tuners.