997.1 GT3/RS/Cup



Laurent purchased a Dundon Lifetime 321SS Black Muffler to go with his Race Header System and Carbon Dual Cone Intake "At idle, sound is suggestive: not that loud but you feel the engine can tell what he thinks. At low revs and duty, sound is soft. It is even strange how they managed to keep the car that streetable. When you push it... read more

Laurent, Reunion Island

997.1 3.6L GT3/RS/Cup and 997.2 GT3 321SS Dundon Race Headers w/ flapped side deletes

Introducing our 321SS long tube correct tuned length stepped headers and light weight muffler combo for 997.1 3.6L, 4.0L all bore, and 4.0L/4.2L stroked engines.


Click on a photo to enlarge.

Race Headers are for Non US or for racing vehicles.

Dundon Race Headers, 321SS tuned length stepped headers and flapped side delete combo for 997.1 3.6L. Many of you who have 996 GT3’s and 997 GT3’s know of Dundon Motorsports and our header designs. They make power, 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.

26whp 23lbft max gains at 6000rpm

25whp 18lbft peak gain at 7500rpm

30lb weight savings over stock system

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