5.0L SR Coyote ROUSH crate engines are rooted in the same engine designs that helped define performance starting in the 1960s. However, unlike the original production engines from that era, modern ROUSH crate engines deliver substantially higher horsepower and torque. As a result, they operate with different performance characteristics, especially under acceleration and load. The foundation remains classic, but the power and response are engineered for a much higher level of output.