My R is undergoing some pretty major changes right now. One of the things I was to share and suggest to those of you who frequent a dyno is a DP mod.<p>Every DP should have a O2 censor in it. Most are a PITA to get to easily. Recently I had another spot put on mine [DP] where another O2 censor could be easliy gotten to and used for a Y band on the dyno for A/F ratios. It might be a good idea to get this done before you mount it on the car. A "plug" can easily be put on it and this should not cost more than 50 bucks tops. The plug comes off with an allen wrench and is metal and goes in a threaded hole. Just makes life much better when you need to get to it. If you are just going to do a DP/exhaust/chip and never dyno it then prolly doesn't matter but if you are going to do any tinkering then it is worth it IMO. I think some of the aftermarket should consider this addition to their offerings. Anyways, just a thought; something I have not seen posted here before and lately it seems as if people are looking for new "material".<p> It would also be good to have this if you plan on getting an A/F gauge.