A new engine performance product for the 2003-2004 Ford Cobra. The first truly adjustable blower boost system, featuring interchangeable pulley rings to allow specific boost increases. This kit comes with one pulley ring.

Features:
• CNC machined from 6061 T-6 aircraft grade aluminum crank hub, pulley rings and multi-position idler plate.
• Choice of 2, 4, 6 or 8lb pulley rings, easily changed after system installation.
• Complete bolt-in, no modifications required. No expensive/complicated tools required to purchase. Each kit includes all tools and hardware required.
• Conversion takes less than two hours.
• Crank hub and pulley rings finished anodized satin black.
• In most cases a longer serpentine belt required. Instructions include recommended belt lengths.
• NOTE: Higher boost levels require EMC-CHIP enhancements to ensure safe levels of engine performance.