i just finished the longtube header and k-member install, and had it re-tuned (checked) at laroocas today. the car made 451 rwhp and 370lbft of torque. thats with a stock pulley, 9psi and stock longblock. needless to say, i'm happy!! . i picked up 24 rwhp with the headers. well i'll see how much it helps this saturday at Cecil!! see u there!!