Catback Exhaust

Catback Exhaust

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how much horsepower will I gain from catback exhaust and cold air intake with ECU upgrade?

I have an A4 2.0T. I know ECU upgrade will give me some noticeable horsepower gain but will high flow catback exhaust and cold air intake give me a little boost too? maybe 10HP more??

your car has a distinct advantage in that it already has a turbo charge installation.

the performance exhaust-catback (and preferably with installation of performance header) will always assist.

but for you i would have to think the fastest/surest way to increase power is by increasing the extent of the forced induction from your turbo (higher level of "boost").

for every 1 lb. increase in boost, you will increase rated stock hp of your engine by approx 6%, so gains can be substantial (up to a reasonable margin of safety in terms of engine stress of course).

-increased boost requires higher level of both air and fuel in proper mix.

this can usually be best accomplished by a pro-tune (performance tune) to reset engine management.
-installation of an intercooler, boost control valve or enhanced wastegate may be required in respect to the turbo and new injectors may also be required .

i am just not that familiar with the audi engine or turbo installation to be more specific - i can only recommend you explore this route before doing the modifications you are considering.

starting point....get on an A4 owners performance forum. there is no doubt in my mind this will be 1 of most popular discussion points (increasing power-increasing boost)....
maybe here

http://forums.audiworld.com/performance/

cheers