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.

The S3L-H rotating assembly is designed to be installed into a standard bore EJ257 semi closed deck block that incorporates a counterweighted 79mm forged STI crankshaft, longer Crawford Billet H-beam rods and Crawford’s 99.5mm offset forged pistons. We use the High performance STI main and rod bearings in this assembly along with the STI piston rings for greater durability under high boost applications. These Genuine STI components allow for maximum safety and reliability. 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 assembly uses our Crawford Billet H-beam rods serve two purposes; 1) to increase the rod ratio which allows for smoother and efficient power delivery 2) and most importantly….the H-beam rods are engineered to be 90grams lighter per rod than the I-Beam rods. Light rods equate to a lighter rotating assembly, which means, a happier and faster revving motor. The S3L-H is best suited for a pump gas motor.

*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