back pressure
#1
back pressure
i have a 09 chevy silverado i put true dual ehaust on it. after doing so i realized between 30 - 50 mph in v4 mod there is this very loud almost grinding or vibrating noise. i have done some research and found that i need to increase the amount of backpressure in the system to remove that vibration any one have a idea on how to increase the backpressure without goin back to stock please tell me!
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