So I've made several posts about pistons of late, this will hopefully be the last one!
Anyway in trying to decide what pistons to buy, there seems to be a fair bit of variance in terms of cost and availability by supplier. Many suppliers have pistons that use 4 rings (looks like 3 compression rings and an oil ring). The original Mini pistons I have use 3 rings instead.
Any concern with buying pistons that have 4 rings instead? Would they somehow be longer or something, or would they not fit to the standard conrods?
Also my pistons are the press fit type but most of whats available seem to be the circlip type. Does that mean that my options are much more limited or can I actually use the circlip type pistons on my press fit conrods?