so i've had a 07 3.7L durango for a few years now. i've been looking for some things to give it a little more power, nothing like turbos or anything like that, just maybe a cool air intake or chip or something but theres not a lot of plug and play things out there for a 3.7L, i've heard for ppl modifying 4.7L parts to go on a 3.7L but i'm not sure how good that could actually be, i did put a different exhaust on but still need more torque in the upper gears, any suggestions or info?