I have a complete whipple supercharger kit for an GM 8.1 liter heavy duty pickup or surburban. The kit is in the great shape and worked great on my pickup. it makes close to 800 lb ft of torque!!!! I am including a programer from whipple as well as extra pulleys. this will make your truck run like a raped ape!!!! lol I would like $3500 for the whole kit.