Description
Khrome Werks 4.5″ HP-Plus Gloss Black Obsidian Slip-On Mufflers
For 2017-Newer M8 Touring Models
Khrome Werks designed these 4.5″ HP-Plus slip-on mufflers for riders who want real performance, clean styling, and a strong exhaust note. When paired with factory catalytic converter head pipes, these mufflers remain 50-state emissions compliant while delivering noticeable gains.
Through dyno testing, Khrome Werks confirmed the results. As a result, riders see up to a 12% increase in torque and a 7% increase in horsepower. At the same time, the mufflers deliver the signature Khrome Werks tone. Instead of harsh or high-pitched noise, the sound stays deep and controlled.
Installation stays simple. Because these slip-ons bolt directly to catalyst-equipped OEM pipes, no tuning is required or recommended. For this reason, riders get stronger throttle response without extra setup or cost.
Features & Benefits
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In addition, the finish matches Harley-Davidson CVO gloss black heat shields
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For durability, the 4.5″ muffler body uses heavy-duty 16-gauge steel
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Because the design works with OEM catalyst head pipes, tuning is not required
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To improve sound quality, the absorptive baffle uses stainless steel mat and high-temperature fiberglass
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As a result, throttle response improves along with torque and horsepower
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For riders who want control, optional bolt-in inserts fine-tune sound levels
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Proudly, these mufflers are made in the USA
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Finally, Khrome Werks backs them with a lifetime warranty
Baffle Insert Options
Khrome Werks 202708P Performance Insert
For high-performance builds, this insert restores strong torque without reducing top-end power. While it slightly lowers volume, it keeps performance intact. Because of this, riders with 124ci or 128ci big-bore engines often choose this option.
Khrome Werks 202711P Ripper Insert
In contrast, this insert uses a 2.25″ straight-through design with a bolt-in flange. As a result, it delivers maximum volume and an aggressive exhaust note. If you want your M8 to sound loud and raw, this insert delivers.
Khrome Werks 202712P Louvered Insert
For riders focused on low-end power, this insert boosts torque while keeping a deep exhaust note. However, it slightly reduces top-end horsepower. In turn, the tone shifts to a deeper sound similar to Rinehart or RC-style mufflers.
Khrome Werks 202713P Decibel Reducer Insert
For compliance, this insert lowers exhaust volume to meet California sound limits. Specifically, it follows SAE J2825 testing standards. As a result, riders can reduce sound without changing mufflers.
