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Honda/Acura Integra Civic Si CRV B18C B18A1/B1 B17A1 B16A 81mm Forged Piston Set. 9.9:1 compression ratio for B18C, 9.4:1 for B18 LS, 9.2:1 for D17A1, and 8.8:1 for B16A. -2.4cc Dished. The set includes four pistons, four set 8100XX rings, and four S656 21mm pins and pin clips. Features Wiseco's Armor Plating™ and Armor Glide™ technology.
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. This set also has Wiseco's Armor Plating™ which reduces heat on the dome, reduces the effects of detonation, and creates a hard yet smooth surface for the rings to rest on. 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 : 81.00mm / 3.189"
C/R : 9.9:1 (B18C), 9.8:1 (B18LS w/ VTEC head), 9.4:1 (B18A1/B1), 8.8:1 (B16A), 9.2:1 (B17A)
Compression height : 29.85mm / 1.175"
Dished : -2.4cc FT
Weight : +/-280g
Piston Pin :S656 21mm
Piston Rings: 8100XX
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.