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Just had a 4" mbrp installed on my truck and it seems pretty loud in the cab around that 1500-2000 rpm range, anybody else had this problem??
 

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Do a search on "Drone" there are some ideas that help with noise at those RPM ranges.
 

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583524,

The LB7's don't have a cat in most cases and it'll make more volume than a LLY or LBZ. If you want to tone it down get one of our MBRP 18 inch resonators and mount it as far forward as possible etc. If does a great job. Call us if you have any questions etc.

Mark @ DPPI
 
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