Track extension help with pic

I am looking into purchasing a 2000 SRX700. I found one that the track seems to have been extended (which I want)
Prob is that the owner knows nothing about it.
attached is a pic of the rear end. Sorry not a great pic.

I would just go and look myself but it is over 4hrs each way, so I was hoping to try here first

He suggested its a 136 but I cannot tell. Is it possible to tell by looking at the rail extenders and the plastic coolant protector?

Thanks all for your help.

Attachment 61497

Attached Thumbnails

 

Track extension help with pic