I want to go to maptun stage 3 on my aero, one thing i love about my car is how quite it is, for stage 3 i understand i need the 3" down pipe but im worried about how noise they car will be afterwards, can anybody give me an idea of how noise it will be?
With the stock catback in place there is little difference, only a bit deeper tone. However the stock catback is very restrictive, and stage 3 will run VERY poorly with it (I tried it for awhile on my car and do not recommend it). If you want to replace it, I highly recommend the BSR/Simons catback. Running a Genuinesaab 3" downpipe and Simons catback on my car... it is as quiet as stock, with a deeper fuller tone. Absolutely smitten with the sound and I am sure you will be as well!
I'm running Nordic stage 3 on my 9-5 Aero and stage 4 on my Viggen.
With the 3" DP and 2.5" cat back you will find a slight increase in exhaust note. All depends on your muffler. I had to put in a resonator for the Viggen cause it was little loud for a cab. My wife drives the Viggen and that is another reason. In terms of air flow restriction, I didn't notice much of a difference, I had the cat removed and put back for emissions and didn't notice s difference either. Good luck.
I have a Jak Stoll 3" DP with full 3" system and magnaflow exhaust. My system is rather loud at speed and I may add a center resonator. The turbo spins so much quicker. Especially noticeable at a stop -- when you give it a good amount of gas from a stop it easily spins the front wheels. :cheesy:
I ahve JT with Jaks cat back, but I have a huge resonator ( glad I did) nice rumble at idle and soem sounds when you get on it but nice on the highway
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