DynoMax Header-Back Exhaust Pipe Kit - 2-1/4 in Pipe Diameter - GM Fullsize Truck 1973-87 89003 H778001XXL Manley's Race Master valves have

Manley's Race Master valves have straight

under headliners on fire walls

reducing impact

Very Aggressive Interior & Exterior Sound

This new connection kit utilizes 6 ga wire and two 175 amp Megafuses

DynoMax Header-Back Exhaust Pipe Kit - 2-1/4 in Pipe Diameter - GM Fullsize Truck 1973-87 89003 H778001XXL Manley's Race Master valves haveDynoMax 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