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    why is it that you could loose torque by putting dual exhaust on?

    ive heard that u can loose torque by putting dual exhaust on why is that? and is it only certain systems u put on or is it all of them?
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    looking for a good dual exhaust system

    hey im looking for a good dual exhaust system for my 2008 v6 mustang.. im looking for a system that will give me hp gain and have a deep throaty sound to it. if you could post a link to go to that would be great.
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    Upgrades to my car without voiding the warrnanty

    I got a 2008 Mustang V6 stock. I was wondering what i could do to make my car quicker and faster without voiding the warranty? Please let me know what i could do, thanks!
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    06 Mazdaspeed 6 Vs 08 Mustang V6

    im gonna race my friend with a stock 06 mazdaspeed 6 auto transmission. ive got a 08 mustang V6 auto transmission with dual exhaust and a cold air intake also made it positraction so im not just peeling out the whole time at the start. He things he can beat me but im not really sure i just...