it's not about the .3 liters that make the difference.. it's what's in the head :P cam sizes from a 2.8 are about 1/4" taller in the lopes thus meaning more torque becase the valves are opening and closing faster.. if you wanted, I have a set of 2.8l cams. I would imagine with a custom chip, these cams would work great. I'd be looking to get like 75 bones for them or so... Anyways, don't expect a chip to make your car much faster. But a custom chip with other hardware is awesome :P