Engines and Components› Pistons and Piston Rings

Wiseco

Wiseco Mitsubishi 4G63 86.00 mm Bore 34.87 mm CH -9.00 CC Piston Set

$778.99

SKU: W00C K666M86

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The Wiseco K666M86 Piston Kit is part of Wiseco's Professional Series, engineered for serious racers and builders. These forged racing pistons are designed for heavy to severe duty race applications and come complete with premium rings. Each piston is manufactured in the USA from 2618 aluminum, ensuring improved tensile strength. Key features include ArmorGlide Skirt Coating for reduced friction and seizure resistance, fully machined crown features, precision ring grooves, anti-detonation grooves, and forced pin oiling.

Fitment

Fitment Guaranteed

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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 K666M86

Videos

Wiseco Pistons and Eagle Rods Combo

Wiseco Pistons and Eagle Rods Combo
Shaving & Balancing Wiseco 9:1 C/R Piston For a 4G63 Eclipse GSX

Shaving & Balancing Wiseco 9:1 C/R Piston For a 4G63 Eclipse GSX

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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