32mm bar up front but it doesn't keep it from rolling over very good with hard driving. I have replaced the end links with poly links.



The sway bar from the 80-90's T/A and IROC is larger and should bolt in. ( 34mm solid and 36mm hollow on the f-body. ) But if u want it to handle better change the upper control arms. Money well spent. It will make it so u can use 12" brakes too.

With the set-up I have on the car, it handles great for its size and weight.