Nippon Racing JDM P73 Pistons are Heat Treated and come with a Ceramic Hard Anodized Surface Down to the Second Ring Groove to Improve Heat Dissipation as well as use with Nitrous. These Pistons are equipped with 4 Cryogenically heat treated 21MM wrist pis and teflon coated skirts.
*This kit is a Press Fit Piston set meaning that they are designed to be used with OEM Original Honda Rods. If you have aftermarket rods, please purchase the Full Floating version of this kit.
ALL NIPPON RACING PISTONS SETS ARE WEIGHT MATCHED TO +/- 1 GRAM. NIPPON RACING PISTONS HAVE DEEPER VALVE POCKETS THAN TRADITIONAL P73 PISTONS TO ALLOW USE OF AFTERMARKET PERFORMANCE CAMSHAFTS UP TO STAGE 3. THESE ARE TRUE HIGH PERFORMANCE RACING PISTONS WITH A HORSEPOWER RATING OF 600 HP.
NEW ADDITION, ROD HOUSING HAS BEEN EXPANDED SO THERE IS NO NEED FOR CUSTOM MILLED RODS WITH THESE PISTONS
COMPRESSION RATIOS ARE AS FOLLOWS:*81.5mm sets are currently in production and available for Pre-Order ships July 2022
81MM B18A/B W/PR3 HEAD 11.8:1
81M B18A/B W/P72 HEAD 12:1
81MM B18C W/PR3 HEAD 11.4:1
81MM B18C W/P72 HEAD 11.7:1
ADD .02 FOR EVERY .50MM IN INCREASED DIAMETER