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      01-28-2012, 02:24 AM   #68
DJ Apex
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Drives: 2006 330i
Join Date: Nov 2010
Location: Houston TX

Posts: 479
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My issue is i dont see how my oct is the issue this whole time since day one when i cut the cats ive been useing 93 oct just till here like 2 weeks ago i switched to 87 cause i didnt see the point of it since it was just being a pain trying new tunes from AA to see if my rear o2 go off and why my front o2 were staying rich!

Aside of the fact of higher oct being good for the motor yes it is but i run a add ever other fill up so thats tossed aside.

Ide really like some input from someone whos done this or has had after market headers and not from what people think they know about this cause not many people have done this mod or headers aftermarket for that fact!

sorry for the bluntness but damit i want my mpg back lol
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