# Wiseco 78-84 HD 1340 ShovelHead 8.51 CR Piston Kit 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. - Complete Package: Each piston includes a wrist pin, rings, and circlips, providing everything needed for installation - Forged Material: Optimizes strength and service life, ensuring durability under high-stress conditions - Performance-Enhancing Features: Varied across applications to maximize both durability and power - Improved tensile strength of forged material optimizes strength and service life - Optimized compression ratio to fit your build and performance goals - Designed and built specifically for each V-Twin engine platform - Engineered, forged, and machined in the USA in Mentor, OH - Wrist pin, rings and circlips included - 3.497 in. Bore, 8.5:1 CR This Part Fits: Year Make Model Submodel 1978-1984 Harley-Davidson FLH Electra Glide Base 1979-1981 Harley-Davidson FLHC Electra Glide Classic Base 1980-1984 Harley-Davidson FLHS Electra Glide Sport Base 1983-1984 Harley-Davidson FLHTC Electra Glide Classic Base 1984 Harley-Davidson FLHX Electra Glide Special Base 1980-1983 Harley-Davidson FLT Tour Glide Base 1981-1984 Harley-Davidson FLTC Tour Glide Classic Base 1980-1982 Harley-Davidson FXB Sturgis Base 1983 Harley-Davidson FXDG Disc Glide Base 1978-1984 Harley-Davidson FXE Super Glide Base 1979-1984 Harley-Davidson FXEF Fat Bob Base 1982-1984 Harley-Davidson FXR Super Glide II Base 1984 Harley-Davidson FXRDG Disc Glide Base 1982-1984 Harley-Davidson FXRS Low Glide Base 1983-1984 Harley-Davidson FXRT Sport Glide Base 1978-1982 Harley-Davidson FXS Low Rider Base 1983-1984 Harley-Davidson FXSB Low Rider - Belt Base 1984 Harley-Davidson FXST Softail Standard Base 1980-1984 Harley-Davidson FXWG Wide Glide Base ## Details - **Price:** 561.5 CAD - **Vendor:** Wiseco - **Type:** Piston Sets - Powersports ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 561.50 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - out of package - Photo - out of package - Photo - out of package - Photo - out of package - Photo - out of package - Photo - out of package - Photo - out of package - Photo - out of package --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/wiseco-78-84-hd-1340-shovelhead-8-51-cr-piston-kit) > Updated: 2026-07-14