Pypes designed this resonator delete H-pipe (HFM78) for 2015-2024 Ford Mustang GT models with the 5.0L V8. It replaces the factory resonator crossover section with a 2.5 in stainless H-pipe that opens up the mid-section for a deeper, throatier exhaust note and improved flow. It reuses the stock catalytic converters, so it is designed to keep the vehicle smog legal. The pipe uses a bolt-on design that fits the stock connection points for a straightforward install.
- Type: H-Pipe
- Style: Resonator Delete
- Diameter: 2.5 in
- Material: Stainless Steel
- Fits: Mustang GT 5.0L
- Emissions: Reuses factory catalytic converters (smog legal)
- Sold as: Each
- Part Number: HFM78
Vehicle Applications
- 2015 Ford Mustang GT (5.0L V8)
- 2016 Ford Mustang GT (5.0L V8)
- 2017 Ford Mustang GT (5.0L V8)
- 2018 Ford Mustang GT (5.0L V8)
- 2019 Ford Mustang GT (5.0L V8)
- 2020 Ford Mustang GT (5.0L V8)
- 2021 Ford Mustang GT (5.0L V8)
- 2022 Ford Mustang GT (5.0L V8)
- 2023 Ford Mustang GT (5.0L V8)
- 2024 Ford Mustang GT (5.0L V8)
FAQ
What does the HFM78 H-pipe fit?
It fits 2015-2024 Ford Mustang GT models with the 5.0L V8.
How does an H-pipe change the sound?
An H-pipe delivers a deeper, more classic muscle-car tone compared to the stock resonated crossover.
What diameter is the pipe?
The HFM78 uses 2.5 in mandrel-bent stainless tubing.
Is this H-pipe legal for street use?
Yes. The HFM78 reuses the factory catalytic converters, so it is designed to remain smog legal and street legal. Emissions rules vary by state, so confirm the requirements in your area.

