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Nippon Racing Part# 65394198-NS-000
Honda/Acura B18A1 B18B B18B1 USDM and JDM Engines. Nippon Racing Performance Full Floating Turbo 81mm Standard Size to 82mm Oversized B-Series Pistons. 81mm-82mm Pistons with Rings. Scat 4340 High Strength Steel Forged H-Beam Connecting Rods with Custom ARP 2000 Alloy Bolts.

**Free Shipping on all Nippon Racing Piston Sets

Resulting Compression:
B18A/B Block and Head 9.23:1
B18A/B Block with B18C1 Head 8.74:1

Nippon Racing has redesigned these pistons to share the alloy of the far superior Mitsubishi OEM Turbo castings.
These pistons have the Deck and the Ring lands Fully coated with a Knock Resistant Coating.
The skirts have been Polished to a dull surface finish to Eliminate potential hot spots and further aid in heat transfer to the cylinder walls.
These pistons have been tested to support over 450 WHP with the proper tuning and supporting mods.
Dome displacement has been matched to within .005 CC .
This results in near identical cylinder compression, yielding more horsepower and better efficiency.

Note for Compression Estimates not listed please use a calculator (choose JDM PR4 as the piston type)
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