Rinehart 4″ Moto Series Muffler End Cap
Precision CNC-Machined Forged Billet Aluminum & Custom Style Upgrade
Customize the rear profile of your Harley-Davidson bagger with the Rinehart 4″ Moto Series Muffler End Cap. Designed as a direct bolt-on replacement for all Rinehart Racing 4-inch slip-on mufflers and 4-inch true dual exhaust systems, the Moto Series end cap combines race-inspired slot cutouts with premium forged billet aluminum construction.
Precision CNC-machined in the USA, the Moto Series cap features clean, architectural relief cuts and engraved Rinehart Racing branding. Available in high-luster Chrome and deep Black Anodized finishes, these replacement caps allow you to refresh worn exhaust ends or switch up your bike’s aesthetic without replacing the entire muffler assembly.
Technical Specifications & Product Details
| Feature / Metric | Product Specification | Rider Benefit |
|---|---|---|
| Brand / Manufacturer | Rinehart Racing | American industry leader in high-performance V-Twin exhaust systems |
| Outer Diameter Fitment | 4 Inches (4.00″) | Engineered specifically for Rinehart 4″ slip-on muffler bodies and full systems |
| Material Construction | CNC-Machined Forged Billet Aluminum | Delivers extreme heat resistance and structural durability without warping or discoloring |
| Available Finishes | Show Chrome & High-Temp Black Anodized | Matches existing chrome or blacked-out Rinehart heat shields and engine covers |
| Hardware Integration | Direct Bolt-On (Uses Stainless Button-Head Screws) | Fast, simple installation into factory-tapped holes on Rinehart 4″ muffler canisters |
Design Highlights & Billet Construction
### Premium Forged Billet Strength
Unlike cheap die-cast end caps that can crack or tarnish under intense exhaust gas heat, Rinehart Moto Series caps are carved from solid aircraft-grade forged billet aluminum. This dense material withstands prolonged exposure to hot exhaust flow and highway vibration, maintaining a crisp, detailed surface finish over thousands of miles.
### Moto-Inspired Custom Detailing
The Moto Series design features longitudinal relief slots machined around the circumference of the cap, giving the rear end of your touring bagger a mechanical, race-ready look. The precision-milled Rinehart script adds an authentic signature touch that complements extended saddlebags and custom rear fills.
Vehicle & Muffler Fitment Compatibility
Rinehart 4″ Moto Series Muffler End Caps are compatible with Rinehart Racing 4-inch exhaust assemblies on Harley-Davidson Touring, Softail, and custom bagger setups:
### Compatible Exhaust Assemblies
- Harley Touring 4″ Slip-On Mufflers: Street Glide, Road Glide, Electra Glide, Road King (1995–2026)
- Harley Touring 4″ True Dual Systems: Rinehart 4″ Classic & Xtreme True Duals
- Rinehart 4″ Church Street & Softail Slip-Ons: Fits all 4-inch round Rinehart muffler bodies
Fitment Note: Designed strictly for Rinehart Racing 4-inch outer diameter muffler bodies. Will not fit 3.5″ Rinehart mufflers, 4.5″ Motopro45 mufflers, or competitor 4″ exhaust bodies without proper bolt pattern alignment. Sold individually.
Step-by-Step DIY Installation Overview
Replacing or upgrading a Rinehart muffler end cap is a fast 15-minute maintenance task requiring basic hand tools.
### Required Tools
- Standard Hex / Allen Key Wrench Set
- Blue Threadlocker (Loctite 243)
- Clean Microfiber Towel & Solvent Cleaner
### Step 1: Removing Original End Cap Hardware
Unscrew the mounting button-head Allen screws securing the existing end cap to the inner muffler baffle and outer canister. Carefully slide the old cap out of the muffler body (a light tap with a rubber mallet may be used if carbon buildup is present).
### Step 2: Cleaning Mounting Surface
Wipe down the inside lip of the 4″ muffler body using brake cleaner or isopropyl alcohol to clear away carbon buildup and debris from the mounting holes.
### Step 3: Installing the Moto Series End Cap
Align the threaded mounting holes of the Moto Series end cap with the holes in the muffler canister and inner baffle. Apply a drop of blue threadlocker to each mounting screw, hand-thread them into place, and torque securely in a cross-pattern.
Frequently Asked Questions
### Are these end caps sold individually or as a pair?
Rinehart 4″ Moto Series Muffler End Caps are typically sold individually. If you are replacing caps on a dual-muffler touring motorcycle, make sure to adjust your cart quantity to two (2).
### Can I install these caps on a 4.5″ Rinehart MotoPro45 muffler?
No. These end caps are engineered strictly for 4-inch outer diameter Rinehart muffler bodies. Rinehart produces dedicated 4.5″ MotoPro45 end caps for larger-diameter touring mufflers.
### Order Your Rinehart 4″ Moto Series End Cap Today
Give your 4-inch Rinehart exhaust an aggressive, race-inspired custom look with CNC-machined Moto Series billet end caps. Order your **Rinehart Exhaust 4″ Moto Series Muffler End Cap** today with fast shipping!
