High performance engine upgrades in Simi Valley, California

Extreme Technologies is a car repair and store institution located at 2280 Shasta Way, Simi Valley, California, United States. If you are looking for lightweight sound control without sacrificing horsepower, look no further. Our Extreme mufflers have been dyno and track tested with no power losses, ensuring they meet or exceed your race track or street requirements. Don't give away your hard-earned horsepower by installing just any muffler - choose Extreme Mufflers for top performance. With years of development and track testing, our USA-built lightweight race mufflers are designed to meet track dB requirements while maintaining the horsepower you've worked so hard to develop. Independently done dyno test charts from well-known engine builders showcase the performance of our race mufflers, with customers reporting faster times on the track with our products.