x2, I thought if anything I would run lean. Running rich isnt as bad but still isnt much fun, had to go over everything with a fine toothed comb. Luckily I was keeping an eye on everything after I installed the XDI just in case there was a hiccup. Does anyone think it might have been because of the metal tube used on the XDI? Maybe the Poly/Plastic tube CAI is the way to go.