The base 1000hp kit, just bolted on to a bone stock L99/auto car at 8psi makes about 550whp on pump. Manual cars obviously make 40-50hp more. Add a 3" cat back, some form of higher octane, turn the boost up and 680whp/740wtq on otherwise bone stock auto car.
Pricing is about the same as a Vortech kit.
Be vewy vewy quiet, I'm hunting GT500's.