Vortech seems to have good support if you have problems with them. Procharger definately makes a more reliable race blower, but Jeff is only looking to make 500-600 hp. He shouldn't have any problems with doing that pretty reliably. I went with a turbo because my car will eventually be a race car/street car with alot more than 600 hp, once I get my Cobra daily driver. I like the convenience of being able to adjust the boost with a turn of a knob to change between race fuel and pump gas.

Briane