My equation on these cars always starts with forced induction, turbos if you can afford it and supercharger if you want a lower cost alternative. I don't bother with all the little mods because they don't have the bang for the buck with the 4.6. A factory 5.0 can make tons of power over stock with aftermarket heads, cam, intake and exhaust because they were so corked up from the factory. The 4.6 wasn't that bad. My 5.0 Coyote doesn't even respond to CAI and exhaust mods because the factory stuff flows so well. All the "cheap" mods aren't cheap when you add up all the money you spend. I'm a big proponent of saving your money to get something that'll make a real difference while maintaining streetability, reliability, and fuel economy; forced induction does all of those things.