Some Saleens did too- although many don't include them in the OEM division despite the fact that you purchased them at authorised Ford dealers, just like SVT...
Got rid of factory 2.73's today and istalled new clutch packs , and 3.73's.
This is the best mod i've done to date. ALL i gotta say is 14's here i come!!
Yeah, I've have to say when it comes up upgrades....gears and Heads are gonna be your top things that you're gonna notice a difference. Almost feel like you added horsepower....but you didn't, you just picked up some quickness you were missing before. Now, just wait until you get heads...of course I bought my heads and a blower at the same time...LOL