Just punched holes in the box and went for test drive...noticing much improved throttle response and resulting wheelspin..seems to shift too early and bogs as a result?
Also seem to be getting 9.5 lbs boost now w/ K & N and airbox mod combined..
Whats next cost effective bang for buck mod? Chip, pulley? Should you do one without the other?

 

Some run 2lb's extra of boost on without a Chip. I would sat to get the best performance you should chip any pulley change. A chip alone will make the SOP meter really feel a change. A chip & pulley together, is a totally different truck!!!