Khrome Werks HP-Plus 4.5″: Acoustic Perfection for the Modern Bagger

The Khrome Werks HP-Plus 4.5″ Edge Tip Slip-On Mufflers for 2017-2026 Harley-Davidson Touring models are designed for the rider who demands a mature, sophisticated, and incredibly deep exhaust note. While many manufacturers focus on making the Milwaukee-Eight engine louder, Khrome Werks focuses on making it sound *better*. The M8 engine has a distinct firing order and exhaust pulse that can sound “tinny” with standard straight-through mufflers. The HP-Plus system utilizes a massive 4.5-inch diameter body to create a large internal resonance chamber, which naturally lowers the frequency of the sound waves. Whether you are cruising on a 2017 Street Glide or the latest 2026 Road Glide CVO, these mufflers provide a rich, bass-heavy soundtrack that enhances every mile of your journey.

The Science of HP-Plus Baffle Technology

What sets Khrome Werks apart from the competition is the patented HP-Plus internal baffle technology. Rather than using a simple perforated tube, these mufflers feature a complex internal architecture including an expansion chamber and high-velocity core. This design is wrapped in high-temp stainless steel wool and ceramic fiber, which acts as an acoustic filter. It absorbs the high-frequency “clatter” of the valvetrain and exhaust, leaving only the deep, percussive low-end pulses to exit the CNC-machined Edge tips. This engineering also ensures that backpressure is maintained, protecting your low-end torque—a critical factor for heavy Touring bikes—while allowing for significant gains in peak horsepower when combined with a high-flow air cleaner.

Expert Tuning & Installation Advice

As specialists in Milwaukee-Eight performance, we consider Khrome Werks to be the “Audiophile’s” exhaust choice. Pro Tip: To truly unlock the potential of the HP-Plus system, we recommend a Stage 1 Air Cleaner and a fuel tuner like the Vance & Hines Fuelpak FP4. While these mufflers are designed to work with the factory tune, the M8 runs lean from the factory. Richening the mixture with a tuner will not only make the engine run cooler but will actually further deepen the exhaust note, making that bass rumble even more pronounced. Installation Note: The 2017-2026 models use specific inlet sizes (larger on the right). Always use new heavy-duty muffler clamps to prevent leaks. Before starting the bike for the first time, wipe the mufflers and the Edge tips down with denatured alcohol to remove any oils or fingerprints; failing to do so can result in permanent stains once the pipes reach operating temperature.

Legendary American Quality

Every set of Khrome Werks mufflers is 100% Made in the USA. The quality of the chrome plating and the precision of the TIG welds are industry-leading, ensuring that your exhaust looks as good in five years as it does today. For the 2017-2026 Touring rider who refuses to compromise on sound quality and wants the aggressive look of the Edge tip, the Khrome Werks HP-Plus 4.5″ is the definitive choice. It delivers the deepest, cleanest, and most authoritative roar in the V-Twin world.

Fitment Note: Fits all 2017-2026 Touring models. Not compatible with Trike (FLHTCUTG/FLRT) models. Designed to re-use factory heat shields for a seamless transition.

Khrome Werks HP-Plus 4.5″ Edge Tip Slip-On Mufflers For Harley Touring

These 4.5″ mufflers provide a deep low rumble that continues to win over the rider time and time again. With Dyno tested performance, you don’t have to rely on the seat of the pants dyno to know that your engine is performing more efficiently.

Features:

• Engineered for performance, style and sound
• Produce the Khrome Werks signature, authoritative tone without annoying high-frequency noises
• Improved torque and horsepower from the hit of the throttle
• Billet aluminum tips can be rotated 360° at 90° increments and feature a high-temp powder coated finish
• Bolt-in optional inserts available that comply with SAE J2825 sound test with no appreciable loss of performance
• Sold in pairs