What's the difference between Mac's In the Fenderwell and their Straight Shot system? I know one goes in the fender and the other stays in the engine compartment. Mac says the Straight Shot is the best one out there better than the In the Fenderwell. I always thought that In the Fenderwell picks up more cold air than the ones underneath the hood? How is the Straight shot better, because of the heat shield? So confused please help!!