Engine bay Cold air intake. What about wheel spacers?

Hey, guys and gals,
Just shorten my CAI from the fenderwell to the engine bay, I sprayed Heat resistant primer on it, up to 5000 degrees to be exact, that seemed to do some good, installed a 4 inch air filter, the largest that could fit, made my own heat shield, installed 180 degree thermostat, and shortening the CAI really made a difference, quicker accelaration, and less of a variable in power/ weather ratio. I mean it still sucks when its hot but not as much now. The 180 degree stat let me somewhat benifit from higher octane gas, or may its me, and the catch can is actually doing its job, all the coffe brown **** going back into the intake is terrible. The Throttle body spacer and intake spacer, inch wide, works like a charm. This web site is the most awsome ever,:SNSign: all of my install Ideas have came from you guys and gals. Thanks alot.:SNSign:
Why do you think that the CAI, when it was shortened worked better the the one that was in the fenderwell? Would anyone reccomend spacers in the front and back or just the back!!!

help!

Come on guys help, I don't have any experience with wheel spacers.

But is there any advantage as far as how the car grips the road?