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    how much are 4:10s worth in the quarter?

    If you're running about 1800rpm at 60 with the stock 3.55 (which you should be) you'll turn 2100 with the 4.10. 2100 at 70mph stock will give you 2425rpm.
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    what weight oil? 06 Mustang GT

    Stick with 5w20!!! Its "pumpability" at start up is much better. You will NOT get better performance, longer wear, better milage, smoother operation or any other so called benefit the neanderthals at the local pub will be spewing when this subject comes up. Look here for everything you ever...
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    Magnaflow Cat-Back reviews...

    For an interesting dicussion on the horsepower gains subject see the following thread. Scroll down and refer to comments made my "F1Fan" http://www.mustangforums.com/m_622735/tm.htm
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    Exhaust Decesion

    Thanks, just ordered the chrome myself!
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    Exhaust Decesion

    I saw the site. It says the inner diameter is 21/2". My stock tips are 3". Did you have to cut off the stock tips???
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    Questioning the MM&FF results

    Interesting you guys noticed this. The horsepower numbers aren't the only thing fishy here. Look closely at the dyno charts. The name of the vehicle and the number of the runs are off. When you run a car you give it a "name" in the dyno computer. Let's say "Johnmustang1" and you give a stock...
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    Problems with taking the top down-vert

    NO problems Like that here either, it sounds like just a bad switch though. Should be an easy repair provided the part is in stock.
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    opinions on exhausts(cat back)

    Look Here Here's a great discussion on this subject. scroll down and refer to "F1 Fan" http://www.mustangforums.com/m_622735/tm.htm