I installed it on my PR CAI. It's hard to find somewhere to put it, as you're not supposed to go between the MAF and throttle body, but its supposed to be as high as possible, on a stright section. It ended up beside my battery. If I has to do it again, I'd get it behind the battery. The fit was easy- don't worry about that. You'll only have problems with the little hose that needs to be extended, and supproting the CAI so it does'nt move, as it will stress the 2 wires going to the oxygen sensor.(the weight of the whole CAI hangs off the throttle body-they don't provide any hangers...)
Wheel gap is the enemy. "Silver" 2001 SE w/perf.pkg, PR CAI, Intrax.