Quote:
Originally Posted by 2978386166
Hi bimmers, I am wondering if anyone had experience on bmw x5/x6 m50i models specifically on modified downpipe.
I heard that a cattless downpipe decreases torque at lower rpms, would it be very significant? How worth it was the extra sound compared to the decrease in torque?
thank you!
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No first hand experience with a M50i, but you never lose reducing backpressure in the downpipe with a turbocharged engine. Less backpressure = better spool = more low end power.