Les.Tansey
New Member
Hi All,
So I've just fitted a Milltek Non Resonated Cat Back exhaust to my B6 S4 Avant. It sounds good, but I did just want a little more volume and rasp. So naturally my first option was to look at Milltek decat downpipes, but it's my daily, and I don't want to be getting pulled over for excessive noise and smell and not having cats fitted to my car - for me this would somewhat spoil my enjoyment of the car.
However, if I was pulled over and inspected for being loud and smelly but I could just get by because I have cats futted and I just fall within the emissions guidlines for the car, then it wouldn't bother me so much. I can be like 'search me, its all Kosher' and then I can crack on with my day without any further bother.
So naturally, I like the idea of 100 cell catalytic convertors so I can try and have the best of both worlds. So I would love to know; has anyone ran 100 cell cats on there S4 B6? And did your car pass the emissions tests/mot?
I've heard that 100 cell cats are more for the track, but yet I have seen them sold as 'Road Legal' too from half reputable looking companies? I just wondered if anyone has already tried and tested this combination with success? Or if I could get any tips on this?
Does anyone know how many cell the standard S4 B6 cats are out of interest? 400 cell? 600 cell even?
I want maximum exhaust flow, whilst just keeping within the law. I want the extra growl and the miniscule power increase too, but also a very very light overrun crackle mapping into the car. So based on the advise of the mapper I'm most likely using (Unicorn Motor Developments, in Stockport), the lower the cell rating of the cat, the more durable it will be in conjunction with the overrun (which will only be subtle anyway, like on the C7 RS6).
Any info would really help guys, so any responses sould be hugely appreciated.
Many thanks,
Les
So I've just fitted a Milltek Non Resonated Cat Back exhaust to my B6 S4 Avant. It sounds good, but I did just want a little more volume and rasp. So naturally my first option was to look at Milltek decat downpipes, but it's my daily, and I don't want to be getting pulled over for excessive noise and smell and not having cats fitted to my car - for me this would somewhat spoil my enjoyment of the car.
However, if I was pulled over and inspected for being loud and smelly but I could just get by because I have cats futted and I just fall within the emissions guidlines for the car, then it wouldn't bother me so much. I can be like 'search me, its all Kosher' and then I can crack on with my day without any further bother.
So naturally, I like the idea of 100 cell catalytic convertors so I can try and have the best of both worlds. So I would love to know; has anyone ran 100 cell cats on there S4 B6? And did your car pass the emissions tests/mot?
I've heard that 100 cell cats are more for the track, but yet I have seen them sold as 'Road Legal' too from half reputable looking companies? I just wondered if anyone has already tried and tested this combination with success? Or if I could get any tips on this?
Does anyone know how many cell the standard S4 B6 cats are out of interest? 400 cell? 600 cell even?
I want maximum exhaust flow, whilst just keeping within the law. I want the extra growl and the miniscule power increase too, but also a very very light overrun crackle mapping into the car. So based on the advise of the mapper I'm most likely using (Unicorn Motor Developments, in Stockport), the lower the cell rating of the cat, the more durable it will be in conjunction with the overrun (which will only be subtle anyway, like on the C7 RS6).
Any info would really help guys, so any responses sould be hugely appreciated.
Many thanks,
Les