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 at 10:1 compression ratio. Forged from high-silicon, low-expansion aluminum for superior strength, reduced weight, and improved heat transfer compared to cast pistons.

Features

• Forged high-silicon, low-expansion aluminum construction
• Diamond-turned finish with no size variation
• Compatible with cast iron, chrome, nikasil, and boron composite bores
• State-of-the-art computerized manufacturing
• Oversized options available for cylinder resleeving

Specifications

• Brand: Wiseco
• Manufacturer Part #: K1665
• Engine: 1340cc EVO Big Twin
• Compression Ratio: 10:1
• Weight: 2.7964 lbs

Fitment

Fits V-Twin motorcycles with 1340cc EVO Big Twin engines. Compatible with cast iron, chrome, nikasil, and boron composite cylinder bores.

Frequently Asked Questions

What compression ratio is this kit?

10:1 compression ratio, suitable for naturally aspirated EVO Big Twin applications.

Can I use this in a chrome or nikasil cylinder?

Yes — Wiseco pistons are designed to work confidently in cast iron, chrome, nikasil, and boron composite cylinder compositions.

What does the kit include?

Complete piston kit with all components needed for installation in your 1340cc EVO engine.

Are oversize pistons available if I need to rebore?

Yes — Wiseco offers a wide range of oversize options, and oversized pistons can be used if cylinders are resleeved.