BBK 1714 Fuel Pressure Regulator Kit, CNC Machined Billet Aluminum - Fully Adjustable Pressure for Chevrolet GM TPI 305, 350 BBK is your Number One Aftermarket Performance Brand in the USA - American Designed and Built CNC Billet Aluminum Construction with anodized Finish Fully Adjustable - From 35-70 Psi Allows Fine Tuning of Fuel System for Improved Performance Recommended for all Modified Applications Helps Improve Horsepower