What is included in this S&S Cycle rocker box kit?

This kit comes with two chrome die-cast rocker covers, along with all the gaskets, o-rings, and mounting hardware needed for installation. It's a complete package to refresh your engine's top end.

Will this kit fit my specific Harley-Davidson model?

This kit is designed for 1986-2016 Harley-Davidson Big Twins and S&S 4-1/8 inch engines. It covers a broad range of models including many Road King, Electra Glide, and Softail variants from 1999-2017.

Do I need any special tools for installation?

While the kit includes all necessary hardware, standard hand tools for motorcycle engine work are typically required. Refer to the manufacturer's installation instructions for specific tool recommendations and procedures.

S&S Cycle Rocker Box Chrome 90-4110 - Harley-Davidson Big Tw

Name: S&S Cycle 1999+ BT 4-1/8in Rocker Box - Chrome
Brand: S&S Cycle
Price: 1103.44 USD
Availability: InStock

S&S Cycle 1999+ BT 4-1/8in Rocker Box - Chrome

$1103.44

On Backorder — Expected to ship by May 7, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

S&S Cycle 1999+ BT 4-1/8in Rocker Box - Chrome. A complete kit for a refreshed look and reliable seal on your Big Twin.

Key Features

Fits 1986-2016 Harley-Davidson Big Twins and S&S 4-1/8 inch engines.
Kit includes two chrome die-cast rocker covers.
All necessary gaskets, o-rings, and mounting hardware are included for installation.
Provides a refreshed and polished look for your engine's top end.

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Will this fit your vehicle?

Product Details

S&S Cycle has been a well-known name in performance Harley-Davidson components for a long time, and this chrome rocker box kit continues that tradition. If you're looking to refresh the top end of your 1986-2016 Harley-Davidson Big Twin or an S&S 4-1/8 inch engine, this kit offers a clean, bright look with the reliability you expect.

This kit includes a pair of die-cast rocker covers finished in a bright chrome, designed to fit right and give your engine a polished appearance. Beyond just the covers, S&S Cycle includes all the necessary gaskets, o-rings, and mounting hardware to ensure a proper seal and straightforward installation. This means you won't have to hunt for extra parts; everything you need to get these covers installed and looking sharp is right here in one package.

Whether you're performing a routine top-end service or building a custom bike, this rocker box kit from S&S Cycle is a solid option. It covers a wide range of popular Harley-Davidson models, including the Road King, Electra Glide, and Fat Boy, among many others. The chrome finish is a classic choice that complements many custom builds and stock restorations alike.