Ok I've been going for nothing but exterior mods since I got my car, other than system and intake. I wanna start doing some engine modifications. What are some things that I could do to make my car run better and maybe gain a little HP at the same time. Things I've thought about so far: MSD Ignition, Skunk2 IM, NGK Wires....any help is appreciated. BTW, not intertested in turbos..don't have that kinda dough at the moment.