[KingLT1]

CAI and Ram air mods usually don't show up well on the dyno because the air entering doesn't pressurize the air box the same as it does driving down the road. Stick your hand out the window on a dyno vs driving down the road at 50mph and let me know if you sense a difference in wind resistance. Yes I know dyno shops normally use big fans blowing air on the front of the car but it still isn't the same.

Even the the Rotofab 4" will show some gains if you go to the track run the stock air box, then take it off and swap the Rotofab and run it. Probably 1-2 tenths quicker. This is a prime example of why you shouldn't get too wrapped up in bench racing dyno number. However if you are looking for mods that will show good gains on the dyno then I would do Headers, Flex sensor, 2.3 pulley, and tune. You will see some good gains on cold hero pulls. Slide the dyno operator a extra Blue bill and he will likely even fudge the correction factor to make the gains look even better.