Earl's Brake Booster Check Valve - 13/16 in Hose Barb Inlet - 1/2 in Hose Barb Outlet - Clear Anodized 33004R adjustable from 5-12 PSI

adjustable from 5-12 PSI

Shock Shim Kit

1983-1995 GMC G2500

1979-1991 GMC G2500

Earl's Brake Booster Check Valve - 13/16 in Hose Barb Inlet - 1/2 in Hose Barb Outlet - Clear Anodized 33004R adjustable from 5-12 PSIThis check valve is for use with naturally aspirated engines only (not for use w Turbocharged & Supercharged engines). 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" Hole for 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: