genesis 4.6 to 5.0

Car- 09 Genesis 4.6 intake flap removal +k&n air filter, straight piped cat removal, 93 gas. Hi i am new here but i will keep it short. I wanted to get my engine bored to a 5.0+ *cant get over the speed of my old 12 5.0 rspec, but basically the cnc machining guy said the cylinder walls would be...