Interprep Performance Tuning has built winning engines for many professional racing teams. How do we build a championships and how do we go about developing real horsepower? It's not a trial and error process, but a thorough, detailed and methodical process of testing, measuring and recording results.

As this site expands, we will be adding more information to these pages, showcasing our success in building championship winning race engines. Stay tuned!

Subaru Performance Engines

Volkswagen Racing Engine info.

2.5 ltr. V-6 Mazda engine information.

SCCA World Challenge Audi S4 race engine.