Apologies for the obscure title, but I have recently bought a spare manifold to polish having been told it is OBD2. After reading reading antera309's thread on the subject I am starting to think it may be OBD1! So basically, does the rear of an OBD2 look like the rear of a 2.9 OBD1? In the space where the part number is usually stamped it is blank thanks damian