I never dynoed the car when it was stock,but other 5 liter Cobras I've seen were making between 230-240 rwhp stock,remember the 5.0 Cobra was rated at 245 hp from the factory,when I first bolted on the turbos I made 430 rwhp/495 ft.lbs. at 8 psi.
with exhaust,heads,cam,and increased boost I picked up another 100 rwhp and 60 ft.lbs. of torque,my comp. ratio is 9.5:1.
The kit is made by Incon Systems they also produce the LPE C5 Vette kit,my Cobra was the prototype vehicle for this kit so Incon installed the kit and tuned the car for 3,000.
if you were to buy the kit from Incon it would cost 4,400 as a DIY kit.
BTW If Paxton can make a DIY blower kit for the Prowler,why can't they produce one for the Viper???