With headers, 3" exhaust bap and inectors, it is over 700 at the rears. Best dyno pull was 680 on a 93 octane tune,uncorrected, but it was 101* degrees ambient air.
With the headers and exhaust I am at 15.87# pounds @6500 rpm, stock lower. The pulley is rated for 18#, so my exhaust is bleeding off 2.13 lbs. I have the 2.67 stock pulley as well, I will include both pulleys to whomever buys it, as well as a bottle of SC oil.