|PRO MOD STYLE GP 18º
Designed for Pro Mod style engines, these pistons are specifically designed for nitrous applications. The precision CNC machined rings grooves
are designed for .043 back cut, 1/16, 3/16 rings. Compression heights figured at zero deck clearance with listed block height. These pistons will only fit Big Chief cylinder heads.
Pin #990-2930-18-51S (174g)
Double spiro locks (#990-042-CS)
Vertical and lateral gas ports for maximum top ring seal