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2007sierra

Help Please

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I have two questions first does anyone know a safe way to be able to fit 285s on my sierra its the classic body style and i have my keys all the way up and it barely fits my 265s :(, and second does anyone know hoe bad my gas milege would be if i ran a y pipe straights. i have a flowmaster and get about 14 around town. also how loud is it inside the cab with a y pipe ? Thanks alot guys !
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  1. ChevyFan's Avatar
    Good questions, however the blogs don't get much traffic for help requests. You'll get more responses in the forums if you repost your questions there. The blogs are more for keeping updated on long-term projects, trips and just general observations.