Can anyone tell me the proper wheel specs for the BBS E51 3 piece wheels that came on the early M81 and Enduro/Capri? They are E51 15 4x108 but don't know the barrel or lip sizes or offset ET?

[url=https://flic.kr/p/2gGPABo]

Mine and Kendal's White M81 came with the one piece BBS 174 KBA 7Jx15 H2 ET13 . BBS tells me they think the same version is aka the BBS RA157 or RA174. The Motorsport catalog says BBS-615 but I think that would be the 6x15" version.


Any help would be great! Trent this is up your alley too!