If I remember right the SSS class runs heads up with a 12.5 breakout. I'm going to try and get in the 12's for the first time. I added a few things last weekend and went to SW to test it out. I should have skipped SW cause the track was like ice. Before I left the shop on Sat. Dan went for a ride with me in the Mach an it hooked hard on the street. After that I thought I'ld finally get a good 60' at the track, boy was I wrong. But when your driving on ice(LOL) its hard to hook up. So I figured the track prep for FFW should be sticky maybe then I'll get in the 12s.