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 ...

The engine is Roush's new show-n-go 427 R crate motor that produces 552 horsepower and 535 ft-lbs. of torque, but still looks good enough to win awards under that vented hood. While there are ...

the ROUSH 427 IR crate engine that produces 552 horsepower and 535 ft-lbs. of torque. ROUSH tells us that its crate motors are finding their way more and more into the custom rides of people who ...