Wiseco · New
Wiseco 2003 HD 1200 (3507X-4720P1) Piston Kit
MPN K1661 · Store SKU wisK1661
Supplier stock checked 11/7/2026, 7:24:37 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
The Wiseco team has led the powersports performance industry through eras and technological advancements, including the rise of high-performance 4-stroke engines. Today, Wiseco's forged 4-stroke pistons are engineered for specific engine applications and manufactured to the tightest tolerances, offering unparalleled performance and strength. Wiseco 4-stroke pistons are proven across all levels of riding and are available for a wide range of models. 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. Flat Top, Stroke: 3.812", Bore Size: 3.508"/+.010", Compression: 9:1 Wiseco 4 Stroke Forged Series Piston Kit, 3.508 in. Bore, 9.6:1 CR
Manufacturer fitment & guides
Check K1661 against the manufacturer’s application information below.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.
- California Proposition 65: Y
