Has anyone seen a # like this on a left exhaust manifold? Application?

C6SE 9431 P
Never seen a 'P' at the end. <!-- google_ad_section_end -->

 

Use with dual exhausts: 1963/67 Galaxie/LTD 352/390 4V / 1963/67 Mercury/Thunderbird 390 4V / 1966/67 Mercury Parklane 410 / 1966/67 Galaxie/LTD/Mercury/Thunderbird 428.

 

Bill, I've seen a ton of manifolds with A, B, = left and right side, but I've never seen a 'P'. What does the 'P' stand for if not left or right. Its on a left sided one. Did they also put the P on a right sided one? Are the port opening different on a P?
Sorry for all the questions, you know me... ;o)

 

P really doesn't stand for anything. When cast for the first time, manifolds have a A suffix, after the same manifolds are cast again and again and again...ad nauseum, the suffix might be a Z.

Look how many applications C3AZ-9431-D has.

 

Interesting. Think I'll keep it just because I haven't seen one before. NOW I'll most likely find them all over the place. Isn't that how it always is. Maybe I can do the same thing with $$$. ;o)