I took my car to get it re-tuned this evening and found out that the previous owner had a crazy tune set up on it. I now need to get a few more components so that I can finish out the tune properly. The stock restrictor pill is missing, should I replace it or get a 3-port? I need to replace the crappy Injen CAI, any suggestions? I need to get a wideband, what's the best one for the money? Car is 06 WRX w/ HKS TBE, HKS BOV. Any suggestions will be helpful thanks.