Quote:
Originally Posted by TTR
https://x3.xbimmers.com/forums/showthread.php?t=1663766
Check this therad, as i see your car is in Europe, and in Europe we all fucked up with OPF filter, what made super turbo lag and actually no sound of engine!
Best solution - put straight downpipes, after put a 200cell sport catalyst with low backpressure in the place of current OPF filter and remap car.
That's way to make a perfect M car with proper sound and respone)
I notice that button of exhaust don't work in all cars with OPF filter
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Pardon my ignorance, seriously ignorant when it comes to exhaust, but does the downpipe delete the cat? I'm looking for a solution to improve the turbo lag, but I'm not willing to delete a cat and have a beautiful, new car that smells like the 1970s. My F97 has no OPF filter. Your thoughts?