Need some help locating piston rings for our 2012 JCW R58. Tore it down for a refresh to discover someone else has already been in it. Originally picked up some standard Hasting rings but the oil rings don't fit. Can anyone help figure out what the heck I've got here so I can buy the correct rings get this thing back together.


Pistons installed.

 

hello,

Thats the piston and its stock size: https://www.ecstuning.com/b-genuine-...h/11257576973/

973-01

We have one in stock on sale. Comes with the rings and everything.

Here is the ring set: https://www.ecstuning.com/b-genuine-...257588266~oem/

 

ECS Tuning to the rescue again!! Thank you!

 

Yep glad to help

 

They don't give them away do they? 😱

 

Nope, MINI prices.

 

Curious, you have the Mahle brand on your site as well. I might be rebuilding the JCW engine from my donor car. If new or over sized are needed, is there no difference between the S and JCW piston? I know there is a compression ratio difference between the two, but I forget if that has to do with the "longer" block or thicker head gasket.

 

Forged vs Normal JCW vs S.

Some Mahle is sold aftermarket per sku and some is not, even though the Genuine MINI part has it. They have contracts so some parts might only be Genuine MINI only.