bhvrdr

don't worry about losing backpressure. You could run NO cats and still make gains down low.

bhvrdr

59lbs was actually for my B7 A4. I measured the S4 at 54lbs. But, yeah...great savings.

Corrado79

Does he still make them? I might be interested.

bhvrdr

I have one for a braille battery he made and it's a nice piece.

RAudi Driver

^^^Agree, but all cars like cold air.

RAudi Driver

the Milltek system is a 2.25".

40valves

weighed 56.5bs on my scale. The battery holder weighs maybe a 1 1/2 lb. I actually measured the fender height before and after, my car went up 1/16'' inch - LOL! The oem battery is a monster,careful not to pull your back out when removing it.

40valves

I'm sure somehow our ecu must adapt to this new found power. Kind of like when I got the GIAC flash, it pinged like crazy but after a day it was all good. I just got the APR dps installed and expected more as far as "butt dyno". Since it had a slight leak i didnt get into it much, now that its all welded up and a week later....it screams! Our cars are pretty damn well tuned from the factory, getting huge gains from these bolt ons are hard. When you add it all up yes you get great gains but, I guess you would have to do them all at once to really feel a huge difference.

AreenS4

the question is, is the fullback exhaust worth it?.if you guys went back would you do it again?

ESFO

Absosmurfly.