Forged from high-silicon aluminum alloy for maximum strength and dependability.
Innovative forging design and piston skirt provide maximum horsepower and torque.
Wiseco High-Performance piston kits are priced with piston, rings, pins and circlips (unless noted otherwise).
Oversize pistons require cylinder sleeving.
The Wiseco HD 1340 1978-84 Shovelhead 8.5:1 Compression Piston (Part Number: 4970P2) is designed for optimal performance in vintage Harley-Davidson Shovelhead engines. Constructed with high-quality materials, this piston ensures durability and reliable operation in demanding conditions. Its precise engineering maintains the original specifications, providing a seamless fit and efficient power transfer for your motorcycle.
This piston features a compression ratio of 8.5:1, making it suitable for classic Harley-Davidson engines from 1978 to 1984. The design incorporates features to optimize combustion and improve engine efficiency, contributing to smoother acceleration and consistent performance. Whether you're restoring an original bike or building a custom project, this piston is an excellent choice for maintaining the authentic feel and power of your Shovelhead engine.
Installation is straightforward, with all necessary attributes aligned to meet OEM standards. It offers a reliable upgrade or replacement part that helps extend engine life and maintain peak performance over time. Trust Wiseco for quality and precision in every component, ensuring your motorcycle runs at its best for years to come.
Features:
- Designed for Harley-Davidson Shovelhead engines from 1978 to 1984
- Compression ratio of 8.5:1 for optimal performance
- Constructed with durable high-quality materials
- Engineered for reliable fit and function
- Ideal for restoration and custom motorcycle builds
