Its Between the Edelbrock Performer Rpm Nitrous Kit and NOS super Power Shot. The NOS kit is about $1oo bucks less. Is the edelbrok kiyt worth the extra bones? It goes up to 250 hp But my max is going to be 15ohp. Seems like both kits will work ,but I do like the Edelbrock cosmeticaly. Dont know if like $100 more.