is there any way i can get a few more ponys out of a TPI system without doing massive overhauling to the entire engine? its a stock LB9. with headers, and a 3in exhaust to the muffler. is there anything i can do on the intake side to gain some more horses without taking the whole intake off and milling the crap out of it? would a simple port and polish on anything help out? im not going for big numbers just yet. just wouldnt mind a little more when i mash the loud peddle.