Originally Posted by 01C0bra
I am getting 4:10 gears for my 2001 cobra but wasn't very sure what I exactly needed (parts etc..). My friend is doing the labor work for free! So that's nice. I know the IRS won't hold too much power but I'm going to swap out pretty soon. So what will I need to buy? 31 spline etc..?
I always thought the 99-01 Cobras had 28 spline axles, but I never really looked into it so that may be the case. Either way, I wouldn't upgrade anything except the gears if you're planning on pulling the IRS soon.
If you just want 4.10 gears
we do sell some by Ford Racing. You can also include a Gear Install Kit, with or without new bearings, as well.
Hope this helps! Let me know if there's anything else I can do!