SpeedFactory - 81.5mm Bore Piston Ring - Single Cylinder - 1.0 x 1.2 x 2.8 High

SpeedFactory Racing product information:
SOLD EACH. (1) RING SET IS FOR (1) CYLINDER.
These SpeedFactory Racing Honda B-Series High Performance GNH Piston Ring Sets are designed for use with OEM and factory-style cast pistons that utilize OEM piston ring size specifications; such as SpeedFactory Racing, YCP, Nippon, RS Machine, etc.
They are gas-nitrided which enhances piston ring durability by creating a hard, wear-resistant surface layer, improves friction reduction, and increases resistance to scuffing and seizing - all ultimately extending the ring's lifespan. 
Available in 81mm, 81.5mm, 82mm, 84mm, 84.5mm, and 85mm bore sizes.
Piston Ring Specifications
Top Ring - 1.0
Second Ring - 1.2
Oil Control Ring (3pc) - 2.8
Keywords: 1x3.10/1.2x3.40/2.8x3.10mm, YCP, Nippon, RS Machine, SFR, B20