FYI: RB Owners, sleeve with billet machined pistons (S3 version)
For those all RB owners that need to put a new piston/sleeve on their engines. For the 3 port engines there's a new item number with the billet machined piston: 1700-036 is the part no.
The 'old' part no. is 1700-035 and has the 'ol and ye known cast piston' (S1 version).
Some time ago was a thread that talked about RB engines and the different pistons present on them, seemed interesting to post this info.