03-04 Cobra Steigemier Stage 5 ported Eaton. Blower has about 1500 miles since front drive rebuild and porting by Steig. Includes Billetflow 2.76 interchangeable pulley hub. I had it tuned by Bob Kurgan and it put down 488/479 @ 14 lbs. belt was slipping, I didn't have any idler pulleys. My only mods at the time were a 2.76 upper, catback, cai. Should be in the 515-525 hp range with lower pulley, offroad mid pipe etc..$725