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Exhaust question for 4.8 motors Exhaust question for 4.8 motors
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Old 09-10-2019, 09:49 PM
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Exhaust question for 4.8 motors
Hello, so my friend was just here with his 2007 4.8, which is identical to mine but his sounds more "throaty". Both are stock.
Did BMW have different mufflers for the e70 4.8's ?
Now i had to fool my secondary O2 on bank 2 because of the efficiency code i got. i'm wondering if my Cat is maybe blocked a little?
Truck drives fine and no codes.
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