Free-flowing 4" HP40 Slip-On for select 2025 Softail models, tuned for deep sound and improved throttle response.
The HP40 2 into 1 Slip-On is designed for select 2025 Softail models and features a free-flowing 4" muffler that improves exhaust flow and produces a deep, throaty rumble.
Made to the same exacting standards as the HP45 and DBX Touring Slip-Ons, this unit fits the factory 2 into 1 header and helps the engine breathe for better performance.
Spiral core baffle technology sharpens throttle response, and the product is backed by a Made in America 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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