upgrading, any help?
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Senior User
Joined: Sep 2005
Posts: 437
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From: Montgomery Alabama
upgrading, any help?
I'm about to get rid of my si/do flowmaster 40, and just cut off from the y pipe put and h pipe and run it back strait to have true duals, will this affect my gas mileage? and is it worth the 150 bucks that it will probably cost, I mean I'm going to do it anyway, I just need selling points with my dad haha; the flowmaster is to quiet that's why I want the switch.. thanks guys
Post Fiend
Joined: May 2006
Posts: 10,007
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From: Central Florida
I'm not sure of your vehicle, but you could run into difficulties with cats and o2 sensors. Nothing major, but may cost a little more. You have alot of figuring to do, big pipes don't usually help gas mileage. Neither to do pipes that are too small, so depending on your engine, I would look at either 2.25" or 2.5" pipes.
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