• The pistons in this section are designed for hardcore drag racing only.
• Will work with 17 and 18 degree Dart Big Chief, Brodix Big Duke and Brodix Pontiac heads.
• Features include gas ports, double forced pin oilers with annular oil distribution grooves and pin fitting.
• Heavy duty enough to stand up to big loads of nitrous.
• Dome is .180 tall and can be cut to flat top if desired.
• Precision CNC cut ring grooves are for .043 x .170 radial top, 1/16 D-Wall second, and 3/16 oil ring sets.
• Oil grooves intersect pin holes, therefore piston pin buttons must be used.
• Pistons are set up for .990 diameter pins.
• Recommended pins are part#990-04-29 and can be found here.
• All pistons in this section include pinfit, however pins and pin buttons are not included.
• For buttons, please scroll down to the bottom of this page.
• Compression ratio is based on .050 piston to head clearance (deck and gasket combined).

w/85cc head