[king of the road]

ive thought to rip out the exhaust and the cat and center box,with a 2.5 pipe all the way to the back where ill fix ona muffler, i read somewhere on here as well that removing part of the intake manifold by machining it or whatever way possible will help it breath and to give my carb a overhaul, would fitting bigger jets bring about more bhp?, i know my fuel consumption would rise.