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 KB660C.STD Forged Piston Kit (103ci.) - Bore 3.875in., 10.0:1 Compression

SKU: 5273741

Kb Performance KB660C.STD Forged Piston Kit (103ci.) - Bore 3.875in., 10.0:1 Compression

KB Performance
$295.06
$295.06 $322.95
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.
Coated Skirts.
NOTE: Each replacement ring PART # denotes rings for two pistons, except 99-06 88 Twin Cam kits, which require two sets.

Pistons forged from 4032 aluminum alloy. Offset pin design for quiet operation. Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings. Piston pin lock rings available separately. Replacement rings are also available separately.

Vehicle Fitment:

2012-2016 Harley Davidson FLD Switchback
2012-2016 Harley Davidson FLHR Road King
2012-2013 Harley Davidson FLHRC Road King Classic
2012-2013 Harley Davidson FLHTC Electra Glide Classic
2012-2016 Harley Davidson FLHTCU Electra Glide Ultra Classic
2015-2016 Harley Davidson FLHTCUL Electra Glide Ultra Classic Low
2014-2016 Harley Davidson FLHTCUTG Tri Glide Ultra
2012-2013 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2012-2014 Harley Davidson FLHTK Electra Glide Ultra Limited
2015-2016 Harley Davidson FLHTK Ultra Limited
2015-2016 Harley Davidson FLHTKL Ultra Limited Low
2012-2016 Harley Davidson FLHX Street Glide
2014-2016 Harley Davidson FLHXS Street Glide Special
2015-2016 Harley Davidson FLRT Freewheeler
2012-2017 Harley Davidson FLS Softail Slim
2012-2017 Harley Davidson FLSTC Heritage Softail Classic
2012-2017 Harley Davidson FLSTF Fat Boy
2012-2016 Harley Davidson FLSTFB Fat Boy Lo
2012-2017 Harley Davidson FLSTN Softail Deluxe
2012-2013 Harley Davidson FLTRU Road Glide Ultra
2016 Harley Davidson FLTRU Road Glide Ultra
2015-2016 Harley Davidson FLTRX Road Glide
2015-2016 Harley Davidson FLTRXS Road Glide Special
2014-2017 Harley Davidson FXDB Street Bob
2014 Harley Davidson FXDC Super Glide Custom
2012-2017 Harley Davidson FXDF Fat Bob
2014-2017 Harley Davidson FXDL Low Rider
2012-2017 Harley Davidson FXDWG Dyna Wide Glide
2012-2013 Harley Davidson FXS Blackline
2015-2017 Harley Davidson FXSB Breakout
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