Full stock S4 TII with RacingBeat exhaust
 

If any body looking for a Rev TII exhaust from racingbeat, here's my dyno.

I removed all emission's related stuff and ported the wastegate.

Boost was at about 10PSI
95 octane pump gas

Max power 235hp (239ps)
Max torque 219ft lbs (296Nm)

Max power at wheels 192hp (195ps)

Ext temp: 75.2°F (24°C)

http://i55.servimg.com/u/f55/14/31/47/32/2014-011.jpg

thats a nice improvement

Yes and that's a lot more fun to drive! Engine's really great now :)