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321SS Long Tube correct tuned length stepped headers and light weight center exit muffler combo for 996 GT3. They add 25whp max gain, reduce weight by 84lbs, sound great, are well made in the USA by Dundon Motorsports, and are guaranteed for life to the original purchaser against cracks, splits, corrosion etc. (repacks of the mufflers not included…)
The system is available in 2 configurations.
1. Dual Exit (Green line on the Dyno Chart)
2. Center Exit (requires GT3 muffler and Center exit bumper, Blue line on the Dyno Chart)
More dynos of Dual Exit