Rear Anti-roll bar question

[1icedearth1]

For the BMR Dragrace Anti-Roll bar there are two you can choose from
F-Body with 3"-3.25" axle tubes
or
F-Body with 2.5"-2.75" axle tubes

My question is does anyone know what size axle tubes a stock 1999 Trans Am has? Also would it matter if you put the Anti roll bar on for the large axle tubes on the smaller ones in case you change axle size latter?

Thanks

[mrr23]

well, i think it's the mounting hardware that requires the specific diameter tubing. if i remember, i'll measure mine tomorrow. you could call them.