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Race Headers are for Non US or for racing vehicles.
Introducing our 321SS long tube correct tuned length stepped headers and light weight muffler combo for 997.2 3.8L, 4.0L all bore, and 4.0L/4.2L stroked engines. They make power, sound great, do not drone and are made in the USA by Dundon Motorsports, and are guaranteed for life to the original purchaser against cracks, splits, corrosion etc.
30whp 20lbft max gains at 7300rpm
28whp 16lbft peak gains at 8000rpm
Brings the car to 500bhp, same as a 4.0RS!