Vance & Hines 4″ Round Twin Slash Slip-On Mufflers For Harley Touring (2017–2026)
The Signature Twin Slash Treatment Built for Milwaukee-Eight Bagger Performance
Transform the acoustic tone and rear aesthetic of your V-Twin bagger with Vance & Hines 4″ Round Twin Slash Slip-On Mufflers. Custom-engineered for 2017 through 2026 Harley-Davidson Touring models, these high-performance slip-on mufflers feature the world-famous Vance & Hines 45-degree angle slash cut treatment, delivering a clean, aggressive look that perfectly complements saddlebag body lines.
Constructed around large-diameter 4-inch muffler bodies, the Twin Slash slip-ons utilize full-coverage 220-degree heat shields to eliminate bluing and thermal discoloration. Integrated louvered core baffles reduce exhaust backpressure, opening up air velocity to produce a rich, deep, and authoritative exhaust rumble for your Milwaukee-Eight powertrain.
Technical Specifications & Product Details
| Feature / Metric | Product Specification | Rider Benefit |
|---|---|---|
| Brand / Manufacturer | Vance & Hines (Made in USA) | Industry-leading V-Twin race engineering and premium manufacturing quality |
| Muffler Body Diameter | 4.0-Inch Outer Diameter Canister | Fills out rear saddlebag cutouts cleanly for a heavy-duty custom bagger stance |
| Cut & End Style | Signature 45-Degree Twin Slash Cut Tip | Iconic custom styling that matches the rear lines of touring saddlebags |
| Heat Shielding | Full-Coverage 220° Plasma-Cut Heat Shields | Protects outer chrome or black finish from heat discoloration and bluing over time |
| Finish Options | Show-Quality Chrome or Matte Black Ceramic | Coordinates effortlessly with OEM engine chrome or darked-out Milwaukee-Eight trim |
Acoustic Tuning & Power Performance
### Louvered Core Baffle Design for Milwaukee-Eight
The factory exhaust headers on 2017–2026 Milwaukee-Eight Touring models contain integrated catalytic converters that naturally dampen sound. Vance & Hines engineered the Twin Slash 4″ mufflers with a specially tuned louvered core baffle system that restores natural V-Twin acoustic depth without causing harsh cabin drone during long highway runs.
### Key Performance Benefits
- Enhanced Flow Velocity: Streamlines exhaust pulses to improve throttle response across low and mid-range RPMs.
- Deep Bass Tone: Replaces the muted factory exhaust note with a deep, authoritative bark under load.
- Optional Baffle Customization: Compatible with optional Vance & Hines Quiet Baffles (sold separately) for riders seeking a slightly reduced decibel output.
Vehicle Compatibility Guide
Vance & Hines 4″ Round Twin Slash Slip-On Mufflers (Part #16801 Chrome / #46801 Black) are designed for direct, 100% bolt-on fitment on all 2017–2026 Harley-Davidson Touring platforms equipped with stock or aftermarket 2″ inlet head pipes:
### Harley-Davidson Touring Models (2017–2026)
- Street Glide & CVO Street Glide: FLHX, FLHXSE, FLHXST (2017–2026)
- Road Glide & CVO Road Glide: FLTRX, FLTRXSE, FLTRXST (2017–2026)
- Electra Glide / Ultra Limited: FLHT, FLHTK, FLHTKL (2017–2026)
- Road King & Road King Special: FLHR, FLHRXS (2017–2026)
- Tri Glide Ultra & Freewheeler Trikes: FLHTCUTG, FLRT (2017–2026)
Fitment Note: Direct fit for both 107ci, 114ci, 117ci, and 121ci Milwaukee-Eight engines using factory dual header pipes.
Step-by-Step DIY Installation Guide
Upgrading your Harley Touring exhaust with Vance & Hines 4″ Twin Slash Slip-Ons takes under 45 minutes using standard shop tools.
### Required Tools
- 3/8″ Drive Ratchet with 1/2″ and 9/16″ sockets
- Torx key set (T27 / T30)
- Exhaust clamp removal tool or combination wrenches
- Penetrating lubricant
- Clean microfiber towel
### Step 1: Removal of Factory Touring Mufflers
Ensure the bike is completely cool and safely supported. Spray penetrating oil onto the inlet joint connections. Unbolt the rear mounting screws located under the saddlebags holding the stock mufflers to the frame brackets. Loosen the factory Torca clamps on the header pipe, then gently twist and slide the stock mufflers rearward until free.
### Step 2: Prepping Clamps & Slide Alignment
Slide new heavy-duty 2-inch exhaust clamps over the expansion inlets of your new Vance & Hines Twin Slash mufflers. Apply a thin layer of anti-seize or lubricant to the header pipe tips to facilitate smooth positioning.
### Step 3: Mounting the Twin Slash Mufflers
Slide the Vance & Hines mufflers forward onto the header pipe outlets until fully seated against the stops. Align the rear bracket mounting points with the saddlebag frame mounts. Hand-tighten the mounting bolts, verify that both twin slash tips align evenly in the saddlebag cutouts, and torque all hardware and clamps to factory service specifications.
Frequently Asked Questions
### Is an ECU re-tune required when installing Twin Slash slip-ons on a Touring bike?
No. If you are installing these slip-on mufflers while keeping the stock air cleaner and factory header pipes, an ECU re-tune is not mandatory. However, pairing them with a high-flow air intake and an ECU tuner (like the Vance & Hines Fuelpak FP4) will maximize horsepower and torque gains.
### Will these mufflers fit with stretched or aftermarket saddlebags?
Yes. The standard 4-inch diameter and classic 45-degree slash cut fit cleanly beneath both standard OEM saddlebags and most aftermarket extended/stretched bagger bottoms.
### Order Your Vance & Hines 4″ Twin Slash Touring Slip-Ons Today
Give your 2017–2026 Harley-Davidson Touring bagger the deep sound, classic styling, and performance upgrade it deserves. Order your **Vance & Hines 4″ Round Twin Slash Slip-On Mufflers** today with fast shipping!
