I suppose the first part of this decision is deciding on what kind of package you want. Do you want a NA car or a forced induction car. I chose to go the route of forced induction since it makes more ultimate power without nitrous. I ultimately chose Jason Heffner to do the work on my Viper since he offers a great product at an extremely attractive price. His products have demonstrated their ability to make significant power with superior build quality. Moreover Jason is willing to stand behind his products and has a great reputation. Do I have anything bad to say? Not one.