AccWagg

sry if theres a thead like this allready


how big of an issue is back pressure on an a6 with a 14b set up? im thinkin bout buyin a high flow cat....but then i thought y spend 100 bux on a high flow if i can just hollow one out or just not use one....and it doesnt seem to me that back pressure will really be an issue at 180 sum od lbs of torque..am i wong?

and i dont care bout emmisions so dont bring that up

FooK

'

run open downpipe.

djfob

just don't run a cat

Zeniceguycrx

the last time i changed my engine i "by mistake" droped a pole through my cat 20 times
felt good

JeenYus

If you don't care about emissions then don't run one, save yourself the money for something else

CRXCavi

Track or street use? Cops in some areas are stricter than others and tend to check that ----.

eBay has cheap high flows, just buy like a $30 one from there, weld up a flange on your dp and bolt right up. That way if you ever take the turbo off to resell, you can just bolt a cheap or stock header back up.