Description Earl’s billet aluminum brake booster check valve replaces the OEM plastic valve for a clean custom appearance. Choose from black or clear anodized finish & (3) vacuum hose options (3/8″ hose barb, 1/2″ hose barb, or -6 AN male flare). Fits most brake boosters or vacuum canisters w/ 13/16″ port (inside diameter of the grommet on the brake booster).The 1/2″ ones are great for LS conversions! Features Billet Check Valve is More Attractive Than Plastic OEM Style Valve Machined from Billet 6061-T6 Aluminum Anodized Black or Clear for Superior Corrosion Protection Choose from -6AN Male, 3/8” Barb, or 1/2” Barb for Vacuum Hose.

Fits Brake Boosters w/ 13/16” Port in Grommet 1/2” Barb Fits Most GM LS Engines, 3/8” Barb Fits Most Other Domestic & Import Engines, -6AN Male for Use w/ AN Hose Valve Material: Premium FKM – Lasts Much Longer Than OEM Plastic & Rubber Valve Fits Most Brake Boosters w/ 13/16” Port (Inside Diameter of the Grommet)