From the leader in V-Twin exhaust systems, the HP40 2-into-1 slip-on exhaust for select 2025 Softail models.
Your new Softail has the look and style you've been longing for, now it's time to make it sound and run as it should!
Rinehart Racing is proud to introduce the all-new HP40 slip-on exhaust system.
Crafted to the same exacting standards as our HP45 and DBX Touring slip-on exhausts, this free-flowing 4" muffler fits perfectly with your stock 2-into-1 header and delivers the deep, throaty Rinehart rumble you know and love. Plus, thanks to our spiral exhaust technology, the HP40 will also help your bike breathe, increasing performance for quicker, more responsive acceleration.
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End Cap Material: Stainless Steel
Muffler Material: Stainless Steel
Mounting Position: Right
End Cap Style/Color/Finish: Black
Type: Slip-on
Muffler Diameter: 4" (10 cm)
All components and gaskets are included
Choose black or chrome finish when ordering
*Fits:
2025 -2026 Harley Davidson FLHCS 1923 ABS Softail Heritage Classic 117 Milwaukee-Eight
2025 -2026 Harley Davidson FXBB 1923 ABS Softail Street Bob 117 Milwaukee-Eight
2025 -2026 Harley Davidson FXLRS 1923 ABS Softail Low Rider S 117 H.O. Milwaukee-Eight
2025 -2026 Harley Davidson FXLRST 1923 ABS Softail Low Rider ST 117 H.O. Milwaukee-Eight
For 2021-later EU Softail/Touring models, the O2 sensor eliminator plug is required (see accessories)
Tech Tip:
Pre-2021 USA mufflers on a 2021-up EU Softail/Touring?
2021 and later US models only have 2 O2 sensors in the manifolds. 2021 and later EU models (Euro 5 system) have a total of 3 or 4 O2 sensors, also 1 or 2 downstream in the muffler(s) or cross-section balance pipe.
Therefore 2021-2026 US exhaust systems will not fit 2021-2026 European models.
The O2 Eliminator Plug (see accessories) allows the 3rd downstream muffler O2 sensor to be disabled, without triggering fault codes.
This will allow the use of pre-2021 US or European exhaust mufflers that do not have a downstream O2 sensor connection.
