timi

so my buddy at work and i both have gt's 04,03. were always talking about what to do next, what will give 'em the best performance, sound, etc. 4.10's always comes up. i know they add about 500 rpms but what if you set the idle down to compensate t save gas?, or will that defete the purpose?

thanks

P Zero

Changing your idle will have absolutly no effect on gas milage.
-P.

mustangman02232

i dont really understand what your tring to say, but 4.10s will only take your mpg down aboot 2 mpg

redass02gt

your idle speed will not change because of the gearing.

Hash06

he should go with it and the gas milage didn't really change for me, maybe 1 to 2 miles a gallon