i am semi building a b18c i bought a set of arias pistons and the part number is 8127 and was told there 12.5.1 comp but im not sure what they are. i have a stoch block and i was told it is 81mm. can i buy any brand rings for those ? as long as there for an 81mm block? also i have a pr3-2 head and was told has type r cams and valves how can i tell?

 

The 8127 isn't the part number. My 84.5mm arias pistons also had 8127, I believe it is the forging number. The part number should start with a 3 and is like 5 or 6 digits long.

 

yeah mine is 6 digit long

 

Searching is awesome http://wickedinnovation.net/downest/...%20compare.JPG

As for cams google ffsquad cams or some **** like that, they have pics of different oem cams.