Well I got my 13b back from the shop about a week ago and have been thinking about going to a 20b. Is it possible to do this and what would be needed to chang the engine? I know I would need the E-shaft, another rotor, housing, but not quite sure what else is needed? If anybody has done this before please let me know what parts are all needed. Again this is just to change the motor from 13b to 20b. I know what else is needed to do the swap.

If you wat a 20b go and buy one, trying to mix and match will cost more as lots of things are different. If you want a short 3 rota call precision engineering in Nz but it would be cheaper to buy an import with all manifolds etc.

Thanks for the info I did a search and found out that there are alot of things different. thanks for the advice though.