Ported intake and spacer is the way to go. I'll put you in touch with Roy from the mach1registry. DONT waste your time with a PHP extrude honed joke. Roy does a waaaaay better job and has seen 4 tenths improvement over non ported for about half the price. I did it and I'm happy. With a CAI, Longtubes, prochamber and cat back with a ported intake and spacer with 3.90's put down 320HP and 330 ft lb and mind you this is a very safe tune. I saw that you make 303 hp now. Porting that thing will free up some sweet hp and probably jump your torque too.