I swapped engines and receieved this AI manifold, but it didn't match up with my original. i have a 96 Civic EX but the motor i got was rebuilt with a 95 block and 97 head. I was under the impression the manifold i got went with the 92-95 engine. that code P2P-A5 was engraved on the manifold, but i could not find anywhere what it means, any help?