Quote:
Originally Posted by audioquest
I have done the Hartge exhaust. I believe the gain is ZERO, but sound nice. I will be running a DYNO on the 29th Jan. But I had also done with ECU remapping. I have to warn you, you will loose the low end. After remapping much better have to tell the tuner that you have the new exhaust system.
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You should really read this:
http://www.xbimmers.com/forums/showthread.php?t=341367
You won't lose any "low end" torque on a turbo engine with a proper exhaust.