The guys at Magnaflow were nice enough to use my car to R&D an exhaust for the Trailblazer SS and give me a free catback when they were done. So I thought I would post this Dyno that I just got back from them. I am kind of dissapointed in the HP numbers but Torque numbers look up to par. Just curious if anybody else has Dynoed their SS and if so what kind of numbers they got. Keep in mind, I do not know what kind of dyno this was, but you can read all about it here .