Most of the team guys will run Carbon Front Arms, Front Shock Tower, Front Upper Brace & Rear U-Brace. We also like the 2 hole front caster blocks as they are made from a harder material.

I personally run the standard front arms during the winter at some of the indoor tracks because here in the midwest it tends to get cold and the carbon front arms don't like impacts with the temps are down...

I sometimes run the B44 rear arms if I need to free up the rear end a little.

The carbon parts stiffen up the car a good bit making it a bit more responsive.