Cheers If I remember correctly when I changed the oil filter it screwed straight onto the back of the block, il have a look tomorrow when it's light, yeah I noticed there different so thought I'd ask you guys for a bit of help iv had loads of rst's but this is my 1st zvh and to be honest I wish I'd bought a cvh one instead as I don't know what parts were used in the conversion but il get there lol, cheers