My tuner shop is telling me I need to upgrade my fuel pump from my DX stock pump. What is a good one to go with or the best one to go with? Do I really need this upgrade? And is the gas tank heavy? Would a 15 gal. fuel cell under the car be a good choice? I don't want a small cell because I may road race in the future. Are there any other upgrades you guys can think of that may help...other than the basic bolt ons. Like radiator? Got the stock DX unit and don't know what would be a good upgrade. Any thoughts would be great.