i made it for $50. that flexible tubing was $20 at autozone, and the filter was $25. when that tubing is scrunched together its solid as hell so i just clamp the rubber fittings over that. it came with a rubber fitting to go over it so i slid that over the tube, and then put that into the tube that the IAT is in.
my only concern is that that tubing might not be wide enough. is 3 inches enough or should i have aimed for 4?