Wiseco K1611 Forged Piston Kit 74ci Pan/Shovelhead 3.497in Bore 9:1 Domed +.060in Oversize

The Wiseco K1611 is a high-performance forged piston kit engineered for Harley-Davidson 74 cubic inch Panhead and Shovelhead V-Twin engines. Featuring a 3.497-inch bore at .060-inch oversize and a 9:1 compression ratio with a domed piston profile, this kit delivers the strength and precision required for demanding street and performance builds on classic Big Twin motors.

Wiseco pistons are forged from a high-silicon aluminum alloy, providing superior structural integrity, consistent dimensions, and reduced thermal expansion at high operating temperatures compared to cast alternatives. The coated piston skirts reduce friction and promote long service life, even under sustained high-stress conditions.

Kit Contents:

• 2 forged domed pistons with coated skirts (part number 4012P6)
• Hastings-style X-Ring package — ring set 3497X (.062" top ring, .062" compression ring, .158" oil ring)
• Chrome wrist pins (piston pins)
• Retainer circlips

Key Specifications:

• Bore Size: 3.497 in. (+.060 in. oversize)
• Engine Displacement: 74 ci (1200cc)
• Compression Ratio: 9:1
• Piston Profile: Domed, high-compression
• Ring Package: Hastings X-Ring style
• Material: High-silicon forged aluminum alloy
• Piston Pin: Chrome

Wiseco's precision manufacturing processes ensure tight tolerances and consistent performance across both cylinders. This complete kit simplifies top-end rebuilds and overhaul projects by supplying all critical components in one package. Designed and manufactured in the USA, the K1611 is the trusted choice for restoring or upgrading classic Harley-Davidson Panhead and Shovelhead engines.