I am looking to get an exhaust system soon and was talking with a local shop and the owner was telling me my car (or any like it) an '02 A4 3.0L already has high flow cats....is it true???....he also said changing out the cats to a hi-flow magnaflow would probably throw a light on.....also, does anyone out there have a Magnaflow muffler???...if so, which one??...do you like it, too loud, too quiet, performance difference???....any help is greatly appreciated....



One more question......I'm going to be changing out my blinker bulbs (front & rear), back-up bulbs, and the side fender blinker bulbs....

According to the Sylvania website the front says it takes a 3457....can i use a 3156, 3157, or 3057???

The rear bulbs are a 7506...can i used an 1156 or 1157??

And last, does anyone know what the side fender blinker light bulbs are???

 

i got my twin pipe magnaflow about 3 months ago. couldnt be happier with it. took about 3 weeks for the whistling to go away cause the top layer burns off. but it sounds like a deep purrr at idle and a mean mother****** when i step on it. as for performance i couldnt really tell a difference to be honest

 

anyone???

 

probably a 3 to 5 % power with a nice tone and worth it because of the sound but that's it