First Dyno!
Stock '02 Firehawk with 345hp Alteration, only mod is a cutout.
With Cutout Open:
325.5rwhp / 338.3rwtq
With Cutout Closed:
320.8rwhp / 338.5rwtq
So I got 5rwhp with the cutout open. I was pretty pleased! With 12% drivetrain losses, that puts me at 370hp at the crank!
There was an '03 Cobra there that did 442rwhp with just a catback and intake. Cool guy and he was SUPER happy with the results.
A pretty tricked out Supra pulled 452rwhp. Pretty sweet for a sixer!
On a different pull when my peak hp was a little lower, my torque was 0.5 ft-lbs higher with it open then the closed pull. Now below 3k, I have no idea, but above 3k, it is almost exactly the same.

