Automotive Solutions for Your Vehicle
Built by enthusiasts. Trusted by builders. Chosen by customers who want it done right the first time.
About Fosth Performance
Our Story
Our Story
Fosth Performance is a family‑owned and operated automotive performance shop proudly based in Monroe, Washington. Built on a passion for innovation, precision, and craftsmanship, we specialize in LS engine solutions ranging from wiring harnesses and ECU programming to complete engine builds from mild street setups to full race-ready configurations.
Our expertise extends beyond engines alone. We offer professional engine swaps, full vehicle builds, and complete restorations, delivering clean, reliable, and performance-driven results tailored to each customer’s vision. Whether you’re modernizing a classic, upgrading a daily driver, or building a high‑performance machine from the ground up, our team is committed to quality at every stage of the process.
Just steps away from our shop is J2 Racing, our fully stocked storefront providing the parts, components, and accessories needed to support your build. Together, Fosth Performance and J2 Racing create a one‑stop destination for performance services and quality parts.
At Fosth Performance, we don’t just build vehicles—we help bring dream projects to life.
Contact
Let's Talk Cars!
Fosth Performance
17239 Tye St SE, Suite D Monroe, WA, USA
Hours
Open today | 09:00 am – 05:00 pm |
