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Message: <blockquote data-quote="I_LIKE_TURTLEZ" data-source="post: 1579031" data-attributes="member: 31555">I had to pause here.Have you ever been in a 4v Cobra? The T45's gears are so long you can do 70mph in 2nd with the stock 3.27 rear ratio. Even 3.73's don't make a big difference on them, cruising RPM barely changes. Going from the 3.27's to 4.30's shaves an entire second off the 1/4 mile, putting the car well into the 12's on a drag radial and allowing the 4v to keep up with modern Coyote cars.With my 4.10's I'm only turning 2400rpm cruising down the highway, that's really not high at all. Average gas mileage has improved because city driving is done in one higher gear, the car stays in it's powerband more providing more torque, requiring less time spent accelerating the car to speed.Totally different animal than the old 302 you're seemingly accustomed to, where they ran out of breath at 5,200rpm.</blockquote>