Got an extra test pipe by a weird turn of events for my a4 b5, would it fit/be worth it to slap on a s4?

 

no, a4 has one downpipe, S4 has 2

 

unless its the 2.8 motor

 

I'm not sure. Only the 1.8T A4 has one DP. The thing about the 2.8 though Is I don't know if it has the same bolt up that we have at the flanges. I know we have 4 nuts from the DP to the turbo on each side. For some reason I remember the 2.8 as having three but Im trying to remember from over a year ago when I replaced a friends motor.

If you have 4 studs on the headers (if 2.8) try it. If you have a 1.8T you could see if the pipe will go up to your K03 as that is what the S4's have stock anyhow.

 

oops! I got that backwards. Sorry.

 

i odnt get the big deal about test pipes. most exhaust shops can give u test pipes for very short money. ill probably going in the next week or so to have my clogged cats taken out and test pipes put in.

 

Won't that be pretty pricey considering the 10hrs labor to remove our DP's?

 

if you just swap out the cats tho, you dont have to remove the whole dp...and its not that bad getting out the DPs, certainly not 10 hours....