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Engines and Components Pistons and Piston Rings

Wiseco

Wiseco 4 Stroke Forged Series Piston Kit, 3.885 IN Bore, 10.5:1 CR

$285.95 $256.99 Save $28.96

SKU: W00C 40186P1

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: 40186P1

V-Twin performance has been around since some of the earliest days of motorcycle racing and engine modification, and Wiseco has been there since the beginning. Applying over 80 years of experience, Wiseco has fine-tuned its V-Twin pistons for each specific engine platform to optimize performance and durability. From reliable rebuilds to all-out race, Wiseco has the pistons for your V-Twin build.

Features:

  • Engineered, forged, and machined in the USA in Mentor, OH
  • Improved tensile strength of forged material optimizes strength and service life
  • Designed and built specifically for each V-Twin engine platform
  • Optimized compression ratio to fit your build and performance goals
  • Wrist pin, rings and circlips included

Wiseco 4 Stroke Forged Series Piston Kit, 3.885 in. Bore, 10.5:1 CR

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

MIA's Description

The Wiseco 40186P1 is a high-performance forged piston kit designed for Harley Davidson Twin Cam 103 engines. Wiseco pistons are engineered for durability and performance, featuring a high-performance ring kit, alloy pin, and dedicated forgings crafted from aerospace alloy for superior strength-to-weight ratio. They are precision manufactured and forged in the USA, with a race-ready dome finish for optimal combustion flow. Key features include horizontal slot-pin oiling for reduced friction and scuff resistance, a pressure seal groove for maximum ring seal, and an Armor Glide skirt coating for race applications to further reduce friction and noise, ultimately contributing to increased horsepower. Each piston is developed from race-proven designs.

Fitment

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Specifications

BrandWiseco
Part NumberW00C 40186P1

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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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