DynoMax Header-Back Exhaust Pipe Kit - 2-1/4 in Pipe Diameter - GM Fullsize Truck 1973-87 89003 H762003XL Holley Double Pumper Carburetor 0-4777S

Holley Double Pumper Carburetor 0-4777S Shiny Finish - 4 bbl - 650 CFM - Mechanical Secondary - Model 4150 - Manual Choke - Not Legal For Sale/Use In California

Engine movement (deflection) is wasted horsepower

Also used in input shafts to register clutch RPM and on wheels to determine wheel RPM

Cuffs are adjustable from 10" to 15"Â

DynoMax Header-Back Exhaust Pipe Kit - 2-1/4 in Pipe Diameter - GM Fullsize Truck 1973-87 89003 H762003XL Holley Double Pumper Carburetor 0-4777SDynoMax Manifold Dual Kit 89003 2. 25 in. Tube Size Includes Reducers Exhaust Pipes 16 Ga. Tail Pipe w Side Exits Hardware Does Not Includes Mufflers Mandrel Bends For Better Flow 100% Aluminized For Sharp Appearance and Long Life Longer Lasting and Sharper Appearance Give your vintage vehicle's exhaust system an upgrade with a DynoMax dual header kit. Designed to attach to OE manifolds, it features a special reducer that allows for a variety of