The transmission is the stock T56. It's the same transmission they use in the Viper, Camaro, Corvette, Corvette Z06, and in the new Shelby Mustang (well, they call it a new trans in the Shelby, but it's the same, just slightly changed). It's a good trans, handles a lot of abuse.
I've got a few other things on there besides the exhaust. Last dyno was 441 RWHP and 432RWTQ, which is about 507 crank hp/ 497 crank tq. I've put on a few more things, so it's over that now. It's fast, but not insane....yet. :devil: