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So i recently got my cats deleted on my 2005 5.7l hemi and ive noticed since doing so, the exhaust is making like a wierd fart rattling sound almost at about 2000 to about 2500pms. It only happens if i am slowly accelerating through that rpm, car has a very deep rumble before and after that rpm. Probably good to mention i have true dual and flowmaster super 10 mufflers on the car rn. Its not mds drone because i have it shut off, so im confused on what that sound is from?
 
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