New exhaust... Loss of torque?
02-17-2013 | 04:59 PM
#11
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Joined: Jul 2011
Posts: 33
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From: La Jolla, CA
My Ride: 535i
I took mine to a different shop, and they welded in spring actuated valves similar to the vacuum valve in the stock secondary muffler.
Low end is back and the drone is almost COMPLETELY gone.
Low end is back and the drone is almost COMPLETELY gone.
02-18-2013 | 10:19 AM
#12
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Joined: Apr 2010
Posts: 286
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From: 1721 E. Lambert Rd #C, La Habra, CA 90631
You can always add in resonators to help reduce the drone/exhaust sound. Electronic valves will definitely help out as well as it'll allow you to close/open the valve when you're driving!
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