I just read an article in Road & Track's Speed magazine where they pitted a GReddy tuned Rx-8 against a Vortech tuned new Mustang GT and a HPA tuned TT. And you best be believe that the TT bitched em both out. It even beat the GT 0-60 and in the 1/4 mile.

 

The HPA unit is pretty damn quick and it looks basically stock too minus the decals and BBS.
Under 4 = supercar pace.