4" HP40 slip-on muffler for select 2025 HD Softails; free-flowing 4" design improves performance and produces a deep, throaty rumble.
HP40 4" slip-on muffler designed for select 2025 HD Softails.
From the leader in V-twin exhaust, the HP40 2 into 1 slip-on is made to the same exacting standards as HP45 and DBX Touring slip-ons and fits your factory 2 into 1 header.
This free-flowing 4" muffler delivers a deep, throaty rumble and, with spiral core baffle technology, helps the bike breathe for snappier, more responsive throttle.
Made in America and backed by a lifetime warranty. 🔊🔥
This product fits the following vehicles. Use the filters below to narrow down the list if needed.
| Manufacturer | Model | Family | Year | Notes |
|---|---|---|---|---|
| Harley Davidson | Softail Heritage Classic 117 | Softail | 2025 | |
| Harley Davidson | Softail Heritage Classic 117 | Softail | 2026 | |
| Harley Davidson | Softail Street Bob 117 | Softail | 2025 | |
| Harley Davidson | Softail Street Bob 117 | Softail | 2026 | |
| Harley Davidson | Softail Low Rider S 117 H.O. | Softail | 2025 | |
| Harley Davidson | Softail Low Rider S 117 H.O. | Softail | 2026 | |
| Harley Davidson | Softail Low Rider ST 117 H.O. | Softail | 2025 | |
| Harley Davidson | Softail Low Rider ST 117 H.O. | Softail | 2026 |
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