About to pull the trigger on one of these full exhaust sytems. Looking for any opinions or suggestions. I like the looks of the CS exhaust and it appears to be built very well. The M4 I've heard has average build quality but the torque dip in the 5K range is less than the CS which is possibly able to be fixed with PCV and a tune.
i have a M4 on mine the only thing i have found was a dip in low down torque but a overall performance and top speed increase. Im really happy with it, however i would like to know if the full M4 system needs the exhaust ring seals or not. i have them in but it has a small leak is it worth taking them out?
I have the full M4 and I would certainly not call it average build quality. Top notch in my opinion. The Four Martin (M4) brothers know what they're doing. I could not be happier I the look, sound and performance.