997.2 GT3/RS/Cup



Jamie I am madly in love with my 991 RS with Dundon Race Headers now honestly its transformed. Was out on the track and an instructor friend who had driven it previously drove with the Dundon Race Headers yesterday and got out and said I quote"what have you done to it" read more

Ahmad, UAE
991 GT3RS Race Headers

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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