High-Performance Forged Piston Kit

Features

• Wiseco's high-tech manufacturing ensures greater operating strength and lower expansion at high temperatures
• Kits include forged pistons with ArmorGlide coated skirts, rings, retainer clips, chrome piston pins and top-end gasket kits
• Twin Cam pistons have ArmorPlating which improves ring seal, eliminates ring micro-welding, and improves the piston's ability to defend against detonation damage
• 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
• 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.
• Replacement rings include rings for one piston only.
• 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.

Specs

• Product Name: Piston Kit
• Model: VM Series
• Piston Material: Aluminum
• Skirt Coating: ArmorFit
• Bore Size: 3.875"
• Piston Size: Standard
• Displacement: 103"
• Stroke Length: 4-3/8"
• Compression Ratio: 9.0:1
• Piston Head Shape: Reverse
• Units: Kit
• Riding Style: Street

Fitments