Improve. If you're looking for your next upgrade, Comp Cams Stage 1 XFI VSR Camshafts are a significant improvement over your stock camshafts. It's hard to improve on an already impressive engine. But Comp Cams delivers with these camshafts, dialing up maximum HP and improved throttle response.
Maximize Top End HP. With two different designs to choose from, Comp Cams has got you covered. Compared to the Stage 1 NSR series, these Stage 1 VSR cams deliver more power in the higher rpm ranges and maximize your top-end and overall HP. The NSR series does not require new springs - to get the incredible top-end power of the VSR series requires a spring upgrade.
Compatibility. These camshafts are designed for the 2005-2010 4.6 and 5.4 Modular three valve V8 Mustangs.
Technical Note. The installation of these Comp Cams will require a phaser limiter kit and custom ECU programming.
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