Great Sound, and Great Power without drone!   We have spent the last TWO YEARS building, testing, iterating and improving this design. Now it's finally ready.   Using the latest technology in additive manufacturing, made from 347SS 3D-printed internals, this design keeps the “valve-open”...

Only for cars previously equipped with Dundon Street Headers. MEGA Crack Pipe deletes valves and muffler, for the lightest, LOUDEST system. Not recommended for sensitive drivers, passengers, or neighbors! Technical Description We spent TWO YEARS building, testing, iterating and improving this design. Using the...

We built the lightest, LOUDEST, most powerful exhaust for your GT4 Clubsport. No valves, no muffler, no compromises. Not for the faint of heart or for tracks with sound restrictions. Ear plugs not included! Dundon tuned-length 321 stainless steel Clubsport headers feed straight into...

Taken from our GT3 Cup exhaust program, this exhaust is the ultimate in performance and sound. BUYER BEWARE! This system has drone and vibration (all things that racecars have) and is NOT for the faint of heart.   If you want it louder than...

In testing the 991.2 GT3 and RS we found the air intake to be restrictive, the 718 GT4RS shares a VERY similar engine architecture and the restriction at the throttle body is no different. With the addition of the larger 93mm Throttle Body and...

1. Eliminates the OPF  2. No Check Engine Lights, and no tuning required  3. Significant power and torque gains: +31whp/+55wtrq! 4. Weight savings over stock: 321 Stainless Steel Muffler version: 10 lbs lighter than stock Titanium Muffler: 25 lbs lighter than stock Inconel 625...

Get the best sounding, most powerful exhaust for your 718 GT4. No compromises. Over 3 years in development and (over!) 11 Prototypes to get it right.   Great Sound, and Great Power without drone! This is the complete exhaust upgrade for your 982/718 4.0L Boxster...

State-of-the-art 3D-printed titanium tips in our new Vented design, built to bolt directly to a Dundon Lifetime Stainless muffler on the 992 GT3 and GT3RS. Printing in titanium lets us shape a vented tip that can't be made from bent tube, and keeps weight...

State-of-the-art 3D-printed titanium tips in our new Vented design, built to bolt directly to a Dundon Lifetime Stainless muffler on the 991 GT3 and GT3RS. Printing in titanium lets us shape a vented tip that can't be made from bent tube, and keeps weight...

Single-bank replacement header for the 992 GT3 or RS. Available individually for Bank 1 (driver left) or Bank 2 (passenger right), so you can replace or service one side without buying a complete system.