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Hi Andrew I have the same set up, Fabspeed downpipe with cat and the Remus exhaust. It was installed 2 weeks ago and I think the sound is as good as a M2 can get however since the install I have noticed a few issues. My car is not tuned and I m far from an expert as my only intention was to make it sound nicer whilst keeping everything else stock.
I noticed at low speeds especially during traffic or at the lights there is some sort of vibration , a bit like tin cans rubbing, it comes and goes but usually very evident when the car is stationary or just rolling
Second is that when going up slight hill at 90-110 kph (50-65 mph) when the car is in high gear IE 6 th or 7 th, the car vibrates and shakes as if it is in the wrong gear. This never happens with the stock exhaust or with the only the downpipe. Is it possible that the car lost torque? Or do I need a tune ?
Btw do you feel that the car is a bit too crazy at start up as it sets off just about every car alarm in the apartment car park
Thanks in advance
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