2006 GT RedFire 5R55S Steeda Ultimate Induction Power Pak with SCT X3 Tune CMDP UDP Magnaflow Catted X
We had 4:10's put in our 2007 GT auto convert. You will not be disappointed! at 60-65 we are doing @2300 rpm's and getting 28 mpg! this will make you smile from now on!
I never got 28 mpg even before I switched to 4.10's, but if you are going by what the computer says your getting probably not accurate, mind gives me about 2 - 2.5 mpg more than when I do the math on the highway miles and about 1 - 1.5 more in city mpg. It says 24 HW mpg but it really is only about 22Wow, really? 28 mpg @ that speed/RPM seems crazy high!