Speed Pro Speed Pro Piston Forged 4.000" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.1 cc Hastings 2011-2019 GMC Sierra 3500 HD

2011-2019 GMC Sierra 3500 HD 78

3/4 and 1 ton

Fluid Capacity: 3

The LED over the power connections will come in handy for troubleshooting as it flashes only when the coil fires

Speed Pro Speed Pro Piston Forged 4.000" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 6.1 cc Hastings 2011-2019 GMC Sierra 3500 HDFully updated skirt profiles Exclusive DUROSHIELD skirt coating. DUROSHIELD provides scuff resistance, reduced bore clearances and enhanced ring sealing. SPEED PRO POWERFORGED pistons are built to stringent specifications with a precision CNC machined dome and skirts and microfinished ring grooves. The manufacturing process ensures that piston weights within a boxed set will not vary more than 4 grams and that skirt sizes are matched to within 0.