H.A.R.M. Mufflers - Herfurth Aluminum Racing Mufflers

MUFFLERS

BUILDER KITS

EXHAUST COMPONENTS

CUSTOM SYSTEMS

& MORE

MUFFLERS

BUILDER KITS

EXHAUST COMPONENTS

CUSTOM SYSTEMS

& MORE

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H.A.R.M. Herfurth Aluminum Racing Mufflers

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Mufflers

exhaust components &

Builder Kits

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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.

H.A.R.M. Founder

Lou Herfurth III

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Explore Builder Kits

We don’t do “bolt on” or “off-road” exhaust systems: ALL of our systems are BUILDER KITS that require final fitting, cutting, and welding!
 
H.A.R.M.’s builder kits provide you with everything you need, not a bunch of pieces that you don’t, and each kit is targeted toward your specific vehicle.
 
We have data on most common/popular vehicles and combinations, but if we don’t have yours, we’ll need a picture or drawing and we can likely put together a builder kit for you!
virus vent race muffler

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”
drag & drive muffler

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”
customer reviews

What Racers Say About H.A.R.M.

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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.

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    H.A.R.M. Mufflers‘ lightweight aluminum and titanium mufflers and exhaust system components are precision-made, here in the USA! Race cars running H.A.R.M. mufflers and exhaust components have shattered multiple class records.

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    By entering this site, you acknowledge that you understand these are RACE CAR parts!

    And RACE CAR parts aren’t for crybabies or for people wanting OEM reliability... but if you’re looking for lightweight, record-setting, performance-type parts, you’re in the right place!

    We DO NOT offer BOLT-ON exhaust systems! We DO offer exhaust system components and customized builder kits that YOU can fabricate and install in a manner of your choosing. Trimming, fitting, and welding IS required!

    Sound good? Let's go!