Long Block: CP S2 for 2004 - 2007 STI
If you want an all new engine, then the Crawford Performance fully built long block is for you.
All components engineered & manufactured by Crawford Performance have been tested for ultimate performance and maximum dependability on and off the race track. Our rigorous testing and numerous accolades assure our clientele that we at Crawford Performance demand the best of ourselves and the products we create. Our clients deserve nothing less.
Just because it’s the most affordable Crawford short block in the "S" series doesn’t mean that this baby can’t pack a punch. The S2 is engineered around a new EJ257 semi closed deck block that incorporates a counterweighted and balanced 79mm forged STI crankshaft, forged STI rods and Crawford Performance designed 99.5mm offset forged pistons. Incorporated into the block are high performance STI main and rod bearings and STI piston rings. These Genuine STI components allow for maximum safety and reliability.. because why fix what's not broken? No cheap knock off parts here. To keep with our high quality standards, we use Crawford offset wristpins to decrease the piston noise associated with forged pistons.
The Cylinder Heads in this Long Block are completely OEM, just like 90% of the engines built here at Crawford. Even our orange 2008 STI Time-Attack record setter that makes 850bhp is equipped with non-ported OEM cylinder heads! This may come as a shock to most of you, as it is very popular in the industry to modify heads. Although it may be beneficial to port heads on NA applications, or those running in a series that require a restrictor for the turbo, Subaru's OEM and upgraded turbo setups don't need any help in this area. The gain you may get with porting can be made up by simply turning up the boost by 1 pound. Asking this of your tuner is far easier and less of a blow to your wallet than dropping the expense on custom head work (usually upwards of $3,000). That being said, upon request we can build you whatever it is you desire! We just like to offer our customers what is proven to perform in it's least expensive form. We are not here to convince you to spend more money on upgrades that only benefit our wallet, not your car's performance.
There are too many factors in a performance build to put an exact number to this motors horsepower and torque potential, so we give each of our motors a "Rated Output" number. We have seen the S2 withstand up to 450bhp. But no worries, if this isn't enough to satisfy that itch for more power, than check out our other Short Blocks built to last with numbers as high as 800bhp.
*The final compression ratio of this motor is 8.3 to 1. Final compression is based off a USDM STI MY2004-2007 with genuine STI parts.
- New 2.5-Liter Semi-Closed Turbo Block
- New Subaru STI Forged Crank
- New Subaru STI Forged Rods
- New STI High Performance High Mileage Piston Rings
- CP-Designed Lightweight Forged Pistons
- CP-Designed Case Hardened and Heat Treated Wrist Pins
- New Subaru STI Cylinder Heads
- ARP 11mm Head Studs
- STI Short Block Installation Kit (OEM Gaskets, NGK Iridium Spark Plugs, Premium MOTUL Break-In Oil, K&N Oil Filter, new OEM Oil Pump)
- Professionally Balanced and Assembled by a Crawford