Wiseco 40186P1 Forged Piston Kit HD TC103 Rushmore 10.5:1 103CID

The Wiseco 40186P1 is a high-performance forged piston kit engineered specifically for the 2015 Harley-Davidson Twin-Cooled (TC103) Rushmore engine platform at a 10.5:1 compression ratio and 103 cubic inches of displacement. Manufactured entirely in the USA, this kit delivers the precision and durability that professional builders and serious riders demand.

Wiseco forges each piston from a high-silicon aluminum alloy for maximum strength and heat resistance under demanding performance conditions. The innovative forging design and piston skirt geometry are optimized to extract maximum horsepower and torque from the TC103 powerplant. These pistons are specifically designed to fit Twin-Cooled Rushmore cylinder heads, making them a direct application-specific solution rather than a universal fit.

Key Features:

• ArmorX coating on the piston crown for reduced wear and superior protection under extreme heat and pressure
• ArmorGlide skirt coating that auto-adjusts to the cylinder wall, eliminating the need to measure piston-to-wall clearance
• Forged high-silicon aluminum construction for superior strength-to-weight ratio over cast pistons
• Dome-style piston with dual valve relief pockets sized for performance camshafts and valves
• Designed and manufactured in the USA using in-house forging and dyno-validated R&D
• Industry-standard piston kit includes pistons, rings, piston pins, and circlips

Wiseco is the recognized industry leader in forged piston technology for powersports and V-twin applications. Each kit undergoes rigorous dyno testing and quality control to ensure precise fitment and long-lasting performance. The 40186P1 is the ideal upgrade for builders rebuilding or hot-rodding the 2015 TC103 Rushmore motor to OEM or above-stock compression specifications.