Quote:
Originally Posted by nate82
I just picked up an '11 335d. A few of my friends have diesel trucks and have deleted the mufflers on them and have measurable hp and torque gains. Has anyone done this on a 335d or X5d and with any gains? What do you think?
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I've been running a straight through exhaust on my 335D's since 2008, all three mufflers (centre & two rear boxes) have been removed.
In terms of performance gains you can expect approx 18-20bhp increase with little to no gain in the torque figure.
My car is currently running at 363bhp and 500lbs torque measured on a Dyno Dynamics rolling road.
My previous 335D running the same map and the stock exhaust system ran at 345bhp with the same 500lbs torque.
Note: UK 335D's stock figures are 286BHP and 425lbs torque.
