Jones Exhaust SU2 2 Aluminized Stamped Y Pipe 2 Single Pipe , 2 Dual Pipes UNBRANDED 7L V8 1986 1990 Jones 7L V8 1986 1990 Chevrolet C60 C6D042 350 5 Barrels 4 Billet Color Shiny with Black Billet Booster Annular Billet Insert Brand Holley Carburetor Use Professional Race CFM 1250 Choke None Circuit 3 Condition New Emission Code 4 Finish Shiny Fuel Gasoline Fuel Inlet Dual High Speed Air Bleed 34 Idle Air Bleed Size 51 Intermediate Air Bleed 70 Marine Use No Material Aluminum Model 4500 Needle and Seat Size 120 Premium exhaust tubing without the premium exhaust tubing price These pipes are constructed from aluminized steel or stainless steel to match the rest of your exhaust tubing