Khrome Werks HP-Plus 4 1/2″ Slip-On Mufflers For Harley Touring 1995-2025

Khrome Werks HP-Plus: The Deepest Voice in the V-Twin World

The Khrome Werks HP-Plus 4 1/2″ Slip-On Mufflers are engineered for the rider who prioritizes sound quality above all else. Covering a massive three-decade fitment range from 1995 to 2025, these mufflers have evolved to meet the needs of every generation of Harley-Davidson Touring engines. While many manufacturers focus simply on volume, Khrome Werks focuses on “tone.” The 4.5-inch muffler body provides a massive internal resonance chamber, allowing the exhaust gases to expand and cool, which naturally lowers the frequency of the sound. Whether you are cruising on a 1995 Evolution Bagger or a 2025 CVO Road Glide with the 121ci VVT engine, the HP-Plus mufflers provide a sophisticated, bass-heavy soundtrack that enhances the riding experience without causing “ear fatigue” on long-distance trips.

Patented HP-Plus Baffle Innovation

The secret to the legendary “Khrome Werks Sound” is the patented HP-Plus internal baffle technology. Unlike standard straight-through baffles that can sound raspy at high RPMs, the HP-Plus design features a unique expansion chamber and a high-velocity perforated core. This core is wrapped in high-temp stainless steel wool and ceramic fiber, which acts as a filter to remove high-frequency “clatter” while allowing the deep, percussive low-frequency pulses to pass through. This design also provides the necessary backpressure to maintain low-end torque, ensuring that your Street Glide or Road Glide pulls hard from a stoplight. It is the perfect balance of fluid dynamics and acoustic science, providing a “clean” sound that highlights the mechanical soul of the Milwaukee-Eight or Twin Cam engine.

Expert Tuning & Installation Advice

As V-Twin performance specialists, we consider Khrome Werks to be the “musician’s choice” of exhaust systems. Pro Tip: These mufflers flow significantly more air than factory units. For 2017-2025 Milwaukee-Eight models, we highly recommend a fuel tuner like the Vance & Hines Fuelpak FP4 to richen the air-fuel mixture. This not only protects the engine from running lean but also further deepens the exhaust note by cooling the combustion temperature. Installation Note: When installing on 1995-2016 models versus 2017-2025 models, ensure you have the correct inlet sizes, as the M8 engine uses a larger right-side muffler inlet. Always use new muffler clamps to ensure a gas-tight seal and prevent “decel-pop.” To maintain the mirror-finish Chrome or the unique Eclipse finish, wipe the mufflers down with denatured alcohol before the first start to prevent fingerprints from becoming permanent marks.

Premium Performance, American Quality

Every set of Khrome Werks mufflers is 100% Made in the USA. The quality of the steel and the depth of the plating are designed to resist the intense heat cycles of an air-cooled V-Twin. For the 1995-2025 Touring rider who wants the deepest, most refined bass note on the market without the “look-at-me” rasp of a competition pipe, the Khrome Werks HP-Plus 4.5″ Slip-Ons are the definitive choice. They transform your Harley into a rolling masterpiece of acoustic engineering.

Fitment Note: Fits all 1995-2025 Touring models. Not compatible with Trike models. Please select the correct year range at checkout to ensure proper inlet sizing.

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

Go big or go home. The 4.5″ mufflers have taken the industry by storm. These mufflers are an ideal upgrade to your motorcycle if you are looking for a bit more pep in your step. The 4.5″ mufflers provide a deep low rumble that continues to win over the rider time and time again.

Features:

• These mufflers have been dyno tested and show a 12% increase in torque and 7% increase in power
• Produce the Khrome Werks signature, authoritative tone without annoying high-frequency noises
• Absorptive baffle covered with stainless steel mat and high temp fiberglass developed just for the Milwaukee-Eight
• 16-gauge muffler bodies
• Sold as a pair