well my son bought an 06 z06 about a year ago. turns out it needed a head job, so he sent them to Manny from Calgary. nice job done! ryan added a katech cam, headers, akropovic exhaust. and the mild to wild remote kit. a gentleman named Toma has a dyno dynamics unit and he did the tune. the car dyno'd at 503 hp and a nice flat torque curve with 484 torque almost all the way through the entire pull. this was ryan's first try at being this deep into an engine, very glad it turned out for him.