Designed for extreme engine builds and race applications, the PROFORM High-Compression Racing Starter delivers unmatched torque and reliability for Chevy small and big block V8s—as well as most V6 engines—using a 168-tooth flywheel and staggered bolt mount. Engineered with 100% brand-new components, this starter offers a robust 4.41:1 gear reduction, making it capable of cranking engines with up to 18.0:1 compression ratios.