Well it eliminated the delayed throttle response and I'm very happy when I step on it and there is no hesitation. Worth every penny to me. The selectable is the best. I waited to do many mods on my car based on the results of many smart Crossfire owner's positive experience. I held off getting into a number of group buys of which many failed or the product was poor. I need to see results before I invest the money. My car performs better with K&N filters, Selectable Sprint Booster and Eurocharged tune. That's is all the performance I need out of my NA Crossfire. Based on my experience, no one can tell me any different.