ant02gt

Yea 3.73's would give you better gas mileage for sure. I dont know the actual numbers though. If you take alot of long drives i would go with 3.73's.

gsxrstang69

If you dont get 4.10's you WILL be dissapointed. Get FRPP gears.

Fizzics Boy

the difference is minimal. my friend put 410s in his mach and still gets 22-23 mpg on the highway.but then again you drive a mustang so why do you care about gas mileage? [&:]

quitbichyn

+1. i recently just ordered a set of 4.10s. but i also have an automatic (unfortuneatly). but my cousin has 3.73s on his 5 speed and its a pretty nice ride. you'll enjoy them.

Quicktime_GT

Thats not true... gas mileage differences is hardly noticable. The rpms you'll be cruising at is what you should consider

Gator

3.90s are inbetween

i have 3.73s, and i cant tell any on my gas milage.
if i ever swap again i will do 4.10s

by the way i bought the motive kit, from rpm outlet with the diablo, for around 400 or so, i did the install my self. i have no gear whine or problems from the motives.

NeedStangSpeed

what size wheel and tires are most of you guys running with 4:10's, are a lot of you leaving the stock 17's on?

devsredgt

this post could last for all of eternity!!!

gt_stang101

Also to consider is a supercharger, correct? Aren't you supposed to run .373's if you have a supercharger?

8banger

Well,,,Seen alot of guys ,,who have no S/C recommend no greater than 3.73's.....and the guys that actually haveS/C love the 4.10's..including me.....