Which pistons do I have?

[Guest Anonymous]

URL: http://www.bmw2002faq.com/reference/pistons/pistons.html

I've checked out the OEM piston guide http://www.bmw2002faq.com/reference/pistons/pistons.html and I have a 121 head with what looks to be the 2002tii+121 pistons (the 4th piston from the left). But the piston in the first column of that table looks exactly the same but has different measurements.

Does this mean I have 10:1 pistons w/ my 121 head?? No wonder the headgasket blew!! Its probably been detonating forever

[Guest Anonymous]

Ive seen 2 types of 121 tii pistons, wich i think one is the us type, like 9.5:1 and the other euro spec...might just measure the dome to identify the 10:1 comp...

Pat