I have an 07 classic LBZ and want to do the typical 3 upgrades. This is my first diesel son i am new to this game. I am mainly looking to increase the fuel economy but also have the power when needed. I have talked to a local performance shop an they recommend the Banks six gun, banks monster exhaust, and AFE stage 2 cold air intake. Any recommendations or advice would be helpful to try and get all the facts i can before i make my decision.