WTT: Challenge Race X-Pipe for...
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10-09-2012, 01:02 PM
BimmerPost Supporting Vendor
Drives: E92 M3,X5M,F30 335
Join Date: Jan 2010
The only way its going to get any more quiet is with a second set of resonators, or HFC's on it. Just an FYI. We can also add on HFCs to a race and will be identical to a Sport model. We have done it for a few customers in the past.
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