Spohn I just had my stillen exhaust 75% redone. Let me explain, with the stillen the exhaust diameter varied in size from joint to joint so what I did was start from the gtm test pipes and go back with a True 2.5 OD piping for each side. I also had the shop weld back in the resonators and the sound is like no other. It sounds like a Porsche but a bit louder and yes the turbo's do in fact spool up a lot faster. I know to most that might sound crazy but I liked the sound of the stillen before going FI and took a gamble on the modification but it paid off. Now I have an exhaust that I know one has and it sounds GREAT. When I go for my tune this Monday at z1 I will snap a few pics...
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