Nitehawk, have a look at this thread where we've been exploring the mysteries of the various length TPMS valve stems.
Long story short, my best advice is to figure out what wheels you have (if OEM) and then look them up on realoem.com to figure out what valve stems you need. Or, if your tires are dismounted, remove one (if you can) and measure it. The 230s seem to be an odd duck, but e.g. the 284s require a "black" valve stem according to realoem. My understanding is that pretty much any aftermarket wheels will use the 36111095375 or 36146792829 (same part, just one part no. was superseded by the other - not sure what the difference is but they are interchangeable) "no color code" valve stems however, as those are the ones that Tire Rack will sell you, and I ASSume that they would only sell what works on the products that they sell.