Pirate Mfg Hot Rod Chrome Aluminum 90 Degree Intake Manifold Vacuum Tee 3/8" NPT SBC BBC Hot Rod Chrome Aluminum 90 Degree Intake Manifold Vacuum Tee 3/8" NPT (National Pipe Thread) Made from aluminum then polished and triple chrome plated Fits all 3/8" NPT (National Pipe Thread) Intake manifolds, 3/8" Hose Barb on one side 1/4" Hose Barb on the other This fitting is found behind the carburetor generally used to feed vacuum to the brake booster and another vacuum operated parts Measures 1-3/4" tall from bottom of threads to top of fitting