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Honda/Acura Integra Civic Si CRV B18C B18A1/B1 B17A1 B16A 81.5mm Forged Piston Set. 11.8:1 for B18C, 10.5:1 for B16A. +5cc Domed. The set includes four pistons, four set 8150XX 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 : 81.50mm / 3.209" Compression height : 30.10mm / 1.1851" Compression ratio : 11.8:1 B18C, 11.6:1 (B18LS w/ B16 head), 11.1:1 (B18A1/B1), 10.5:1 (B16A), 10.8:1 (B17A1)
Dome : +5cc
Weight : 281g
Piston Pin : S656
OD : 21mm
Length : 50.85mm / 2.002"
Wall thickness : 3.98mm / 0.157"
Rings: 8150XX For: 1990-00 Acura Integra B18A1/B1 1994-01 Honda B18C 1992-93 Acura Integra GSR B17A1 1993-01 Honda Civic SI B16A B18 LS with B16 Vtec Head