Honda/Acura Integra Civic Si CRV B18C B18A1/B1 B20B B16A 84.5mm 10.7:1 Piston Set - K623M845

Honda/Acura Integra Civic Si CRV B18C B18A1/B1 B20B B16A 84.5mm Forged Piston Set. 10.6:1 compression ratio for B18C, 10.5:1 for B20B and B18LS (w/ B16 head), 9.4:1 for B16A. -2.3cc Dished. The set includes four pistons, four set 8450XX rings, and four S656 21mm pins and pin clips.

On and off the street, you can depend on the maximum strength and minimum variance of Wiseco's aluminum-forged pistons for your sport compact vehicle. Wiseco's pistons outgun cast and hypereutectic pistons, giving you stronger pistons and tighter tolerances than any other part in your engine, with less internal and external machining. The advanced forging, extensive heat-treat, and finishing process assure you of the performance and reliability you demand from your engine.

Wiseco sport compact pistons feature Generous Valve Pocket Design that allow maximum flow around valve; and Piston Crown shapes designed to promote maximum intake charge efficiency through scavenging mixture "Cross Flow' during intake and exhaust valve overlap, which equates to more fuel and air, thus more horsepower. Wiseco pistons are also designed to optimize squish or quench during the compression-combustion cycle, resulting in resistance to detonation and pre-ignition. The end product is longer engine life and increased horsepower potential. Additionally, the pistons feature Complex Piston skirt profiles that reduce power robbing friction, yet promote stability in bore for optimum ring seal. Wiseco has also added Armor Glide™ coating to most sport compact pistons. Every piston features precision CNC machined ring grooves with proper orifice/accumulator volume using calculated groove root diameters and axial widths, and have excellent surface finish and flatness providing maximum ring seal that minimizes blow-by and oil consumption. Finally, Wiseco utilizes the latest technologies featuring forged shapes, advanced materials, and featured aligned grain flow technology, in their world class forging facility.

Bore : 84.50mm / 3.327"

C/R : 10.7:1 (B18C), 10.6:1 (B18A1/B1 w/ B16 head, B20B), 9.9:1 (B18A1/B1), 9.4:1 (B16A)

Compression height : 30.00mm / 1.181"

Dished : -2.3cc FT

Weight : +/-296g

Piston Pin :S656 21mm

Piston Rings: 8450XX

1st ring: Alloy steel, gas nitrided, barrel faced.

2nd ring: Cast iron, phosphate coated, taper faced, napier hook.

Oil rings: 3-peice assembly, stainless steel flex vent spacer, gas nitrided rails.