Gain 25+ whp on your 991.1 Mezger Powered Cup CarPackage includes: 321 Stainless Steel Race Headers 321 Stainless Steel Lifetime Muffler

Gain a much needed 25+whp in your 2012 to 2016 991.1 Mezger powered Cup Car. Package includes: 321 Stainless Steel Race Headers no valves Inconel Megaphone Center Exhaust "Crack Pipe" Make your Cup sound like an RSR! View this post on Instagram A post...

Gain Big Power and that RSR Sound you all Crave! Our Race Header and Inconel Megaphone Center Delete Package gets it there! Package includes: Race Headers Inconel Megaphone Center Exhaust "Crack Pipe" By harnessing and controlling the pressure waves in the exhaust we can...

Add 30+whp to your 991.2 Cup or CupMRPackage Includes: 321 Stainless Steel Race Headers 321 Stainless Steel Lifetime Muffler

Gain Big Power and that RSR Sound you all Crave! Our Race Header and Inconel Megaphone Center Delete Package gets it there! Package includes: Race Headers Inconel Megaphone Center Exhaust "Crack Pipe" By harnessing and controlling the pressure waves in the exhaust we can...

Our Megaphone crack pipe features... Inconel 625 Megaphones for enhanced wave strength (more power) Full 3.5" X Pipe merge   YOU HAVE BEEN WARNED! This system sounds badass, BUT…. It was designed for race cars, and as such, it is UNCOMPROMISING It drones at...

At Dundon, we test our products endlessly to ensure the utmost quality. And over time, we found the factory muffler couldn’t keep up with the added performance our Headers provide. We set out to fix that. The result — Dundon’s GT3 Lifetime Center Muffler....

At Dundon, we test our products endlessly to ensure the utmost quality. And over time, we found the factory muffler couldn’t keep up with the added performance our Headers provide. We set out to fix that. The result — Dundon’s GT3 Lifetime Center Muffler....

Need to dial it back a little bit? Get a meatball flag at your last track day? Our Quiet Tips take the edge off for the sound meter, but not your car's performance! Technical Description With the unique design that doesn’t sacrifice looks, the...

Hardware Kit to Install a 321SS Lifetime Dundon Muffler on 997 and 991 GT3 Cup cars. The 2.5" version also works for 981 GT4/Clubsport cars retrofitting a GT3 muffler using our adapter kit. Kit includes: Flanges (2.5" for stock headers or 3" for Dundon...