Differential Install Kits

This isn’t a warehouse — it’s a performance shop. At FAST of West Chester, every part we sell has been installed, tested, and pushed on real builds.

Led by Dave Brown, our team knows what works, what doesn’t, and what actually delivers results. No guesswork. No wasted money. Just proven performance.

Unlike large online retailers, our recommendations are based on hands-on experience with Subaru, JDM, and performance platforms — ensuring every part we offer delivers reliable performance, fitment, and results.