Im currently building my custom IRS using a new aluminum Ford 8.8" IRS center from 99-04 Mustang cobras with 31 spline inner billet stub axles, shafts, and 33 spline outer billet stub axles for 09+ Corvette ZR1 SKF hubs, from the driveshaft shop rated at 1800rwhp.

Lots of aftermarket gear and carrier selections for the 8.8" and its more than strong enough for any amount of power u can possibly put to the pavement in a road racing setup!