Engines and Components› Pistons and Piston Rings

Wiseco

Wiseco Honda K-Series +10.5cc Dome 1.181x86.5mm Piston Shelf Stock

$225.99

SKU: W00C 6650M865

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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Wiseco 6650M865 is a Professional Series forged piston engineered for Honda K-Series engines. It features a +10.5cc dome crown, an 86.5mm bore, and a 1.181-inch (30mm) compression height. This piston is designed to support high compression, forced induction, and high-RPM race builds on K20A and compatible K-Series platforms.

Wiseco's Professional Series offers their highest tier of performance piston construction, built for serious racers and engine builders. The dome profile is ideal for naturally aspirated builds aiming for maximum power output. Key features include 2618 forged aluminum construction for superior strength and resilience, ArmorGlide® skirt coating to reduce friction and noise, and a fully machined crown for precision ring grooves and enhanced seal technology.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandWiseco
Part NumberW00C 6650M865

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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