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Discussion Starter #1
I have an 05 GMC LLY, it has MBRP 4" exhaust with no cat and I was wondering if I could take out the MBRP muffler and still have enough back pressure and if it would be extremely loud? Thanks
 

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Second that I did it just to see what it would sound like. I couldnt tell much of a difference at all with out the Banks muffler on. So its gone baby!
 

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Not going to lie, mine is a lot louder at WOT, but not too bad otherwise. I had the same kit and is hissed more at WOT, w/o the muffler it is a deep, groaning sound:ro) . I like it better straight-piped, but it's all personal prefernce
 

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Sry dumb question WOT? And do you think it helped at all? And would I have any problems with warranty?
 
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