New to Powersport Superstore? Try our Year-Make-Model search and find the right parts for your ride by clicking "My Garage" on the upper-right! ➡

Kb Performance KB263.050 Cast Piston Kit (74ci., Domed) - .050in. Oversize to 3.488in., 9:1 Compression

SKU: 4057910

Kb Performance KB263.050 Cast Piston Kit (74ci., Domed) - .050in. Oversize to 3.488in., 9:1 Compression

KB Performance
$312.75
$312.75
Sale Sold out
/
Shipping calculated at checkout.
In stock and ready for shipping
This is a pre order item. We will ship it when it comes in stock.
Bore: 3.488in.
Compression: 9:1 Compression
Sizing: 0.050in. Oversize

High-quality premium performance pistons are a special hypereutectic T5 aluminum alloy. This alloy makes it possible to build a lightweight piston that makes more power, runs great, uses less fuel and lasts longer than other pistons. Kit includes 2 cast pistons, 1 set of Hastings moly rings and piston pin clips. Instructions included.

Vehicle Fitment:

1941-1950 Harley Davidson F
1941-1964 Harley Davidson FL
1953-1964 Harley Davidson FLF
1965-1969 Harley Davidson FLFB Electra Glide
1958-1964 Harley Davidson FLH Duo-Glide
1970-1979 Harley Davidson FLH Electra Glide
1955-1957 Harley Davidson FLH Hydra-Glide
1965-1969 Harley Davidson FLHB Electra Glide
1955-1964 Harley Davidson FLHF
1970-1972 Harley Davidson FLHF
1965-1969 Harley Davidson FLHFB Electra Glide
1971-1978 Harley Davidson FX Super Glide
1974-1978 Harley Davidson FXE Super Glide
1979 Harley Davidson FXEF Fat Bob
1977-1979 Harley Davidson FXS Low Rider
Secure, Trusted, and Encrypted

Protected by industry-leading 256-bit SSL encryption and backed by Shopify’s PCI DSS–compliant infrastructure. Every page, click, and transaction is encrypted and monitored for threats — so you can shop with confidence knowing your data stays protected.

Parts for Every Machine

We stock aftermarket parts, gear and accessories for motorcycles, ATVs, UTVs, snowmobiles, personal watercraft, and even performance cars — all backed by expert support and live inventory.

Real-Time Fitment Accuracy

Search by Year, Make, and Model with confidence. Our proprietary vehicle fitment system ensures you’re only shown what fits — no guesswork, no returns — just parts that fit.

Fast, Trackable Shipping

We ship from over 20 U.S. warehouses — often same or next business day. Every order includes tracking and transparent fulfillment updates from start to finish, all processed through a secure, encrypted checkout.

Quick Links

Ride With Us. Stay Connected.

Follow us for real-time fitment updates, gear drops, and pro tips from the garage. No spam, just parts, tech, and news for riders like you.

Your Garage

Add a Vehicle