Dart SB Chevy Pro 1 Platinum Cylinder Head - Bare: Intake Runner: 200cc, Comb. Chamber: 64cc, Angle Plug, Intake Valve 2.02", Exhaust Valve: 1.60" AS05421 2020-2021 Chevrolet Silverado 3500 HD

2020-2021 Chevrolet Silverado 3500 HD 82

Triple Trap Door Baffle

XP cages eliminate bind on the bearing and reduce drag

Mid-top driving shoes feature a suede outer layer with a Pyrovatex flame-retardant cotton material inner liner which offers a high level of heat and flame protection

Dart SB Chevy Pro 1 Platinum Cylinder Head - Bare: Intake Runner: 200cc, Comb. Chamber: 64cc, Angle Plug, Intake Valve 2.02", Exhaust Valve: 1.60" AS05421 2020-2021 Chevrolet Silverado 3500 HDDart's highly popular small block Pro1 heads have been given the full Platinum treatment utilizing wet flow technology. Independant tests have demonstrated a typical 25 horsepower gain over the previous Pro1 design. The redesigned chamber features improved fuel distribution, spark plugs are located high and and as close to the center of the chamber as possible and five angle intake seats shear the liquid fuel and air as it enters the chamber. The