just the addition of 4.10's with traction being the same usually nets about 3 to 4 tenths at least that has been my experience installing them on about 4 different cars, no way will it net a full second unless something went very wrong in the baseline run..and you will usually pick up a little miles per hour also ..not much but every bit helps..
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2000 GT,150 shot NOS, black chrome cobras 17x10.5 and 17x9, 4.10's, slp lm, prochamber, SCT Xcal with Kauffmans tune, and a bunch more
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