Forged from a high-silicone aluminum alloy to deliver long life and consistent dimensions
Wiseco's high-tech manufacturing ensures greater operating strength and lower expansion at high temperatures
Sold in kits that include two pistons, rings, piston pins and circlips
Include forged pistons with coated skirts, rings, retainer clips and chrome piston pins
Piston kits are available with X-Ring package (.062 top ring, .062 compression ring and .158 oil ring), XC-Ring packages (.039 top ring, .062 compression ring, .158 oil ring) or VM-rings (1.2mm steel, positive twist, gas nitrided top ring, 1.2mm cast iron, taper under-hook scraper ring and 2.0mm three-piece, flex-vent oil ring with steel chrome-faced rails); VM-rings, X-Rings and XC-Rings will not interchange
X- and XC-rings are identified by PART # in the application chart; X-Ring PART #s end with an “X” and XC-Ring Part #s end with an “XC”
103″ kits require cylinder boring; 110″ kit requires big-bore cylinders and case boring; X-Ring package (.0472″ top ring, .0472″ compression ring and .118″ oil ring); recalibration required
Pistons are made in the U.S.A.
NOTE: Replacement rings include rings for one piston only.
WARNING: Wiseco pistons that use VM-rings can only be fitted with Wiseco VM-rings; Wiseco pistons that use XC-rings can only be fitted with Wiseco XC-rings.
||Must Use Thunderstorm Heads.