These pistons are specially designed for forced induction and nitrous applications. Pistons include .310" pocket depths and precision CNC machined ring grooves that accept 1/16, 1/16, 3/16 rings.

Includes:
Pin #927-2950-15-51S (140g)
Contact reduction grooves
Double Spiro Locks # 927-042-CS
Double Pin Oilers
Bore: 4.155 Stroke: 3.750 Rod: 6.000 Deck: 9.000 Price per piston.