This is slightly ironic, but one of my fraternity brothers has a Twin Turbo Stealth (I think it's a 93 or 94 model). Anyway, last season he ran his a couple of times at the track with just the air filter removed and didn't even get a 13 second slip. I think the best he got was a 14.2. He has recently gotten slightly bigger turbos and a bigger downpipe, but he hasn't ran it since then.
Yes they are AWD, but despite that, the guy I know was only getting 2.0x 60' times.
So, if I were you, I would strap on some decent tires and whip his a**. It shouldn't be a problem if you can run low 13's, especially if he has stock turbos, 'cause they suck. Good Luck
