However, its cast-aluminum pistons are a weak point inside the engine that limit it to 430 horsepower and 475 pound-feet of torque. The Roush 427 SRX crate engine, for comparison, also uses a cast ...

More than 45,000 vehicles – school and shuttle buses, work trucks, and other vehicles – are on the roads with Roush technology. Our commitment to being a leader in advanced engine technology ...