ADJUSTABLE FUEL REGULATORAdjust fuel pressure for maximum horsepower gain!Lightweight CNC machined billet aluminumShow stopping, tough blue anodized finishMaintain proper air/fuel ratio for all your power add-ons! Ensures proper air/fuel ratio for optimum fuel economy and improved horsepower. Designed for perfect fit for easy installation. Use with BBK Performance Throttle Bodies (sold separately) for real bolt-on power!