I have 2 Water temp gauge adapters left that I bought for a couple of friends. Most of them dont own Rb Cars no more and sure they can still use it but I rather just sell them quick. These are needed if you want to run a water temp gauge. The standard size is 36mm(which I have in blue) but you can also use a 38mm(Red).

heres a pic of what they look like but are not the actual item.
http://www.racespecperformance.com/W...20_ADAPTOR.jpg

Price is 20 each and probably 5 extra for shipping.