i have an '05 1.8t quattro a4, wanna build an exhaust, i heard that there is a sensor after the cat (nothing unusual), how will a high flow cat and no mufflers, 3 inch pipe all the way back, act on the sensor? in other words would the dashboard in my car become a christmas tree....
i know most turbo cars do not like a lot of back pressure is this the same with audis or would i need to instal mufflers as well?
Thanks,
ari

 

IMO, you should just get one of the pre made kits. It eliminates all the Question. and you are garenteed a good sound.