Quote Originally Posted by V1nny View Post
make sure your spark plugs are two ranges colder than stock for stage 3.
Also MAF housing diameter is critical, tuner must tune for a specific diameter, most common 85mm, and 90mm, both OK, as long as tuner knows the exact diameter.
Intercooler hoses are probably needed, considering age of your original hoses.
I had good experience with South Bend stage 2 endurance clutch, it holds stage 3 just fine, but above recommended B7 RS4 is almost as good for fraction of the price.
Original RS4 intercoolers are not that great fit for narrow body S4, consider SRM, if not able to afford for now, you will be OK with XS crap for most of the times, except really hot days, until you save for better intercoolers.
Hitachi MAF is way better for stage 3, in any case tune will be for a specific MAF brand, just like is for the MAF housing diameter .
Not sure why everyone say hitachi is better than Bosch maf.

I use a b7 s4
Maf paired with a allroad 4.2 airbox and it’s been great


Sent from my iPhone using Audizine Forum