Thread: Muffler Delete back pressure??
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Old 04-24-2010, 04:48 PM   #9
longbeachss2010
 
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Drives: black SS
Join Date: Apr 2010
Location: long beach ca
Posts: 363
it may be the mufflers deleted cause i got mines done. and loss 2 mpg of my car now i have 16mpg than stock with 19 mpg
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