Wiseco V-Twin Piston Kit - 1340 EVO BIG Twin 10:1 Comp — Harley-Davidson Electra Glide Classic, Softail Custom, Softail Heritage Classic (1984-1999)

Wiseco V-Twin piston kit for 1340cc EVO Big Twin engines with 10:1 compression ratio. Forged from high-silicon, low-expansion aluminum for strength, reduced weight, and extended engine life across cast iron, chrome, nikasil, and boron cylinder compositions.

Features

• Forged high-silicon aluminum construction
• Diamond-turned finish from CNC computer-controlled machines
• Fits cast iron, chrome, nikasil, and boron composite cylinders
• Low expansion rate reduces piston-to-cylinder clearance wear
• State-of-the-art computerized manufacturing for consistent quality

Specifications

• Brand: Wiseco
• Manufacturer Part #: K1675
• Engine: 1340cc EVO Big Twin
• Compression Ratio: 10:1
• Weight: 2.71 lbs

Fitment

Designed for V-Twin motorcycles with 1340cc EVO Big Twin engines. Compatible with all modern cylinder types: cast iron, chrome, nikasil, and boron composite.

Frequently Asked Questions

What cylinder types will this piston work in?

Wiseco pistons are engineered to work in cast iron, chrome, nikasil, and boron composite cylinders without any issues.

Can I use Wiseco oversize pistons to restore a worn cylinder?

Yes — oversizes are available for cast iron cylinders. Chrome, nikasil, and boron cylinders can be resleeved to accept Wiseco oversize pistons.

Why is the diamond-turned finish important?

The diamond-turned finish from CNC machines guarantees a perfect surface with zero size variation, ensuring consistent fit and performance across all pistons in the kit.

What makes Wiseco aluminum different?

Wiseco uses high-silicon, low-expansion aluminum that delivers superior strength, reduced weight, improved heat transfer, and longer piston life compared to standard materials.