Race-Proven Exhaust Builder Kits
Need Something a Little More Custom?
Mufflers for
Street/Strip Use
MUFFLERS
BUILDER KITS
EXHAUST COMPONENTS
CUSTOM SYSTEMS
& MORE
MUFFLERS
BUILDER KITS
EXHAUST COMPONENTS
CUSTOM SYSTEMS
& MORE

H.A.R.M. Herfurth Aluminum Racing Mufflers
About H.A.R.M. and Lou Herfurth III
Herfurth Aluminum Racing Mufflers (H.A.R.M.) specializes in lightweight racing components, precision-made here in the USA.
We offer aluminum and titanium mufflers and exhaust builder kits as well as system components for your race car, drag and drive car, street/strip car, drift car, or show car. Multiple class records have been shattered by race cars running H.A.R.M. mufflers and exhaust components!
On our championship-winning racecars, we’ve been running aluminum exhausts for 13+ years and have as much or more experience in what works and doesn’t than anyone!
We have stock size mufflers but also welcome CUSTOM SIZES and/or STYLES. If you need something unique or have an unconventional idea, reach out to contact us and let’s talk about it.




Read to Fab?
Explore Builder Kits
Loud/Aggressive Tone
Virus Vent muffler’s design promotes maximum flow!
A loud and rowdy muffler offering some DB reduction, make no mistake – our Virus vents are designed to be “race volume.”
- Exhaust sizes: 2.5”, 3”, and 3.5”
- Standard case length: 9”
- Overall length: approximately 12”
Smoother/Softer Tone
Our Drag & Drive mufflers use a perforated titanium core!
A high-performance muffler that offers good DB reduction, it’s 50% open for maximum sound absorption into our proprietary 3-layer design packing.
- Exhaust sizes: 2.5”, 3”, 3.5” and 4”
- Standard case length: 12”
- Overall length: approximately 15”
What Racers Say About H.A.R.M.

Matt Lang

Vinny D'Angelo

Derek Simon

John Nugent, Jr.

Todd Pansini
CONTACT H.A.R.M.
The quickest and most efficient way to contact H.A.R.M. Mufflers is to like our Facebook page and send us a message there.
Looking for a QUOTE? Click here to send us your info!
Otherwise, please fill out the form to the right and we will get back to you as soon as possible!
In the meantime, please take a look at our mufflers and exhaust builder kits.
