what c15 do i have??

I am guessing BXS with 6NZ valve cover base to delete the VVA's. Air compressor is one used for Accerts and has fuel recirculation plumbing like early Acerts.

 

would be simple to just plug into the ecm and see what file it is but looks like a bxs to me

 

It does look like my BXS, same compressor, but manual fuel pump which I don’t have, different valve covers.

 

I wouldn't trust what ECM shows because appears to be a combination of C-15 and C15 parts. Pulling oil pan and seeing rod cap bolt fasteners would tell you between the two. Here is description of where S/N plate should. Cat used to stamp S/N in blocks and you can see it on my 7FB plain as day on right rear of block, but I searched a 6NZ pretty good once and couldn't find it stamped.

 

thats a 6nz with acert twins bro