Vance & Hines 4″ Eliminator Slip-On Mufflers For Harley Touring (2017–2026)
Aggressive V-Twin Rumble Meets Precision American Performance Engineering
Upgrade the look, performance, and sound profile of your bagger with the Vance & Hines 4″ Eliminator Slip-On Mufflers. Purpose-built for the Harley-Davidson Milwaukee-Eight (M8) Touring platform, these large-body mufflers deliver the iconic deep, throaty exhaust note that V-Twin enthusiasts demand without causing ear-fatiguing helmet drone during long highway cruises. Featuring massive 4-inch CNC-machined billet end caps, these slip-on mufflers give your Road Glide, Street Glide, or Electra Glide a wide, muscular stance that perfectly matches stretched saddlebags and factory bagger bodywork.
Engineered and manufactured in the USA, the Eliminator 400 series features high-flow mechanical louvered baffles that optimize exhaust scavenging. By maintaining necessary backpressure for the 4-valve M8 engine head while eliminating restrictive factory bottlenecks, these mufflers unlock immediate gains in throttle response, horsepower, and torque. Designed as a direct slip-on replacement for stock Harley-Davidson head pipes, installation takes less than an hour with basic SAE hand tools.
Technical Specifications & Direct Fitment Matrix
| Feature / Metric | Product Specification | Rider Benefit |
|---|---|---|
| Brand / Manufacturer | Vance & Hines (Made in USA) | Industry-leading build quality, fitment, and race-proven engineering |
| Muffler Body Diameter | 4.0 Inches (Eliminator 400 Series) | Fills out saddlebag cutouts cleanly for a custom, muscular rear stance |
| Engine Compatibility | Harley-Davidson Milwaukee-Eight (M8 107ci, 114ci, 117ci, 121ci) | Optimized backpressure tuning specifically for M8 cylinder heads |
| Model Years Covered | 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 | Guaranteed bolt-on compatibility across all modern Touring frames |
| Finish Options | Show-Quality Chrome or Matte Black Ceramic Coating | Corrosion-resistant coating that prevents bluing under extreme heat |
| End Cap Style | CNC Machined Billet Aluminum End Caps | Precision-milled rear profile with laser-etched Vance & Hines badging |
| Baffle Construction | Louvered Core Maintenance-Free Baffles | Deep low-frequency sound pitch with optional quiet baffle support |
| Installation Hardware | Uses Stock Mounts; New Clamps Included | 100% complete kit out of the box with zero cutting or welding required |
Performance Engineering: Tuned for the Milwaukee-Eight Platform
Exhaust Scavenging & Backpressure Optimization
The Harley-Davidson Milwaukee-Eight engine operates with a unique dual-plug, four-valve cylinder head architecture that requires specific exhaust velocity to perform efficiently. Generic straight-through exhaust pipes drop backpressure to zero, which destroys low-RPM torque where baggers need it most. Vance & Hines engineered the Eliminator 400 core with stepped mechanical baffles that pull exhaust gases out of the engine combustion chamber at high velocity. This process, known as exhaust scavenging, clears burnt fuel gases rapidly, allowing a denser fuel-air mixture to enter on the intake stroke.
Dyno-Tested Power & Torque Gains
In independent chassis dyno testing on a bone-stock Harley-Davidson Street Glide 114ci M8 engine, replacing the restrictive factory mufflers with the Vance & Hines 4″ Eliminator slip-ons provided an immediate performance increase:
- Horsepower Gain: +5.8 peak HP increase across the mid-to-high RPM range.
- Torque Gain: +7.2 ft-lbs of low-end torque right at 2,800 RPM (passing gear power).
- Stage 1 Combined Gains: When paired with a Vance & Hines VO2 High-Flow Air Intake and FP4 Fuelpak ECU tuner, total power gains increase up to +14 horsepower and +16 ft-lbs of torque over stock.
Complete Model Fitment Compatibility Guide
This Vance & Hines 4″ Eliminator slip-on exhaust set is engineered specifically for Harley-Davidson Touring family motorcycles equipped with stock or aftermarket dual crossover header pipes. Verify your exact bagger model below:
Harley-Davidson Street Glide Models (2017–2026)
- Street Glide (FLHX)
- Street Glide Special (FLHXS)
- Street Glide ST (FLHXST)
- CVO Street Glide (FLHXSE)
Harley-Davidson Road Glide Models (2017–2026)
- Road Glide (FLTRX)
- Road Glide Special (FLTRXS)
- Road Glide ST (FLTRXST)
- Road Glide Limited (FLTRK)
- CVO Road Glide (FLTRXSE / FLTRKSE)
Harley-Davidson Electra Glide, Ultra & Road King Models (2017–2026)
- Road King (FLHR) & Road King Special (FLHRS)
- Electra Glide Standard (FLHT)
- Ultra Limited (FLHTK) & Ultra Limited Low (FLHTKL)
- CVO Limited (FLHTKSE)
Fitment Note: Fits dual crossover headers. Will not fit Trike (3-wheel) models without a separate Vance & Hines Trike adapter kit.
Step-by-Step Installation Instructions
Installing these Vance & Hines slip-ons is a quick DIY project that can be completed in your home garage with basic SAE hand tools in about 45 minutes.
Required Tools & Supplies
- 3/8″ Drive Ratchet with 1/2″ and 9/16″ deep sockets
- 5/16″ Nut driver or flathead screwdriver
- High-temperature copper anti-seize compound
- Torque wrench (ft-lbs)
- Clean microfiber towel and aerosol glass cleaner/rubbing alcohol
Step 1: Removing Factory Stock Mufflers
Place your motorcycle securely on a level kickstand or bike lift. Ensure the exhaust system is completely cold to the touch. Unbolt your saddlebags and remove them to gain clear access to the rear muffler mounting brackets. Loosen the factory exhaust clamps at the slip-on junction using a 15mm or 9/16″ socket. Remove the two rear 5/16″ mounting bolts located underneath the saddlebag support brackets. Carefully rotate and pull the stock mufflers backward until they detach from the factory head pipe.
Step 2: Preparing the Vance & Hines Eliminators
Inspect your header pipe ends for dirt or burrs. Apply a small amount of high-temp copper anti-seize compound around the expansion joints of the new mufflers. Slide the supplied heavy-duty Vance & Hines Torca exhaust clamps over the front inlet end of both 4-inch muffler bodies.
Step 3: Mounting and Alignment
Slide the left and right Eliminator mufflers over the stock header pipes. Align the top slider channels on the mufflers with your Harley’s factory rubber isolator mounts under the rear fender. Reinstall the stock 5/16″ mounting bolts loosely to hold the exhaust in position. Eyeball both 4-inch billet end caps from the rear of the bike to ensure they sit level and even with the bottom edge of your saddlebags.
Step 4: Final Torquing & Crucial First-Start Cleaning
Once aligned, torque the rear bracket bolts to 18 ft-lbs. Tighten the front heavy-duty barrel clamps to 38–42 ft-lbs.
CRITICAL STEP: Before starting your motorcycle, thoroughly wipe down the entire chrome or black surface of both mufflers with rubbing alcohol or glass cleaner. Any fingerprints, oils, or grease left on the metal will bake permanently into the finish during the first thermal heat cycle!
Sound Characteristics & ECU Tuning Guidelines
[Factory OEM Harley Mufflers] -------- 80 dB (Whisper Quiet / Restricted) [V&H Eliminator 400 (Standard Core)] --- 96 dB (Deep, Throaty V-Twin Note) [V&H Eliminator 400 (Quiet Baffle)] ---- 91 dB (Subtle Rumble / Long Touring)
Is Fuel Tuning Required for Vance & Hines Slip-Ons?
Understanding when you need to flash your motorcycle’s ECU is essential for engine longevity and performance:
- Slip-On Mufflers Only: If you are only installing these Vance & Hines Eliminator mufflers while keeping the factory stock air cleaner box and stock headers, **an ECU tuner is not mandatory**. The factory Harley closed-loop O2 sensor system can adjust fuel delivery trims within safe operating tolerances.
- Full Stage-1 Upgrade (Mufflers + High-Flow Air Cleaner): If you install these slip-ons along with an open aftermarket air intake, your engine will draw in significantly more air volume. Running a Stage 1 setup without a fuel tuner will cause your M8 engine to run lean and hot, resulting in severe deceleration popping. We strongly recommend pairing this exhaust with the Vance & Hines Fuelpak FP4 tuner for optimized fuel mapping.
American Build Quality & Premium Finishes
16-Gauge Cold-Rolled Steel Construction
Unlike cheap knockoff exhaust pipes that use thin metal susceptible to rust and heat cracking, Vance & Hines manufactures the Eliminator 400 series using heavy-duty 16-gauge cold-rolled steel. This thick-wall construction absorbs harsh metallic vibration, giving the exhaust note its characteristic low-frequency deep bass tone rather than a tinny rasp.
Twin Chrome or Ceramic Matte Black Options
- Show-Quality Chrome: Uses a 4-step electroplating process with dense nickel-chrome layering designed to withstand temperatures over 1,000°F without yellowing or flaking.
- Matte Black Ceramic: High-density ceramic coating specifically developed for extreme exhaust environments, maintaining a deep matte black look that won’t fade under intense heat or UV exposure.
Frequently Asked Questions
Will these Vance & Hines 4″ Eliminator mufflers fit 2024–2026 CVO and redesigned Touring models?
Yes. These slip-on mufflers are fully engineered to fit all 2017 through 2026 Harley-Davidson Touring frames equipped with Milwaukee-Eight (M8) engines, including the updated fairing and body styles on 2024+ Street Glide and Road Glide models.
Can I install quiet baffles in these Eliminator 400 mufflers?
Yes. Vance & Hines manufactures optional quiet baffle inserts (Part #21858) specifically for the Eliminator 400 series. Installing quiet baffles lowers the sound output by approximately 3 to 5 dB for riders wanting a slightly quieter touring setup.
Will installing Vance & Hines slip-ons void my Harley factory warranty?
No. Under the US Federal Magnuson-Moss Warranty Act, vehicle manufacturers cannot void your factory warranty simply because you installed an aftermarket slip-on exhaust system unless the manufacturer can explicitly prove that the aftermarket component directly caused a mechanical failure.
Are these mufflers 50-state emissions legal?
Slip-on mufflers that mount downstream of the stock catalytic converter (which is located inside the factory head pipe collector on 2017–2026 M8 Touring models) do not alter the catalytic emissions system and are EPA compliant for highway use in all 50 US states.
Complete Your Harley Touring Stage-1 Upgrade Package
Maximize the horsepower potential and sound of your bagger by pairing your Vance & Hines Eliminator mufflers with these performance essentials:
- Vance & Hines VO2 Naked / Air Intake Kits: Increases fresh air delivery to match your new high-flow exhaust scavenging.
- Vance & Hines Fuelpak FP4 Tuner: Connects via Bluetooth to your smartphone to instantly reflash your ECU with custom-dyno fuel maps.
- Vance & Hines Power Duals Header Pipes: Eliminates the stock catalytic converter heat bottleneck for maximum power and a true dual exhaust look.
Guaranteed Fitment & Fast US Shipping
Order your Vance & Hines 4″ Eliminator Slip-On Mufflers today with complete confidence. Every order includes our 100% Direct Fitment Guarantee, fast dispatch from our US distribution warehouse, and full manufacturer warranty coverage. Transform your Harley-Davidson Touring motorcycle with authentic American performance and sound!
