The 03 lower intake has IRMCs. If you have to make it work. You can force the IRMCs open with 2 clamps. The IRMCs are the butter fly valves you see in the lower intake. They connect electronically and add 5 hp. But you can force them open with clamps where they externally manually open. I did it for a few years to a intake instead of changing intakes.
new engine,1.7 rocker arms,Pipes exhaust, shorty cats , shorty headers,under drive and overdrive pulleys,4.2 upper plenum, throttle body spacer, cold air intake, stage one clutch, shorty shifter, and tune. 8.8 in storage