the exhust manifold will fit but im pretty sure they're exactly the same and there would be no benefit. There is no "off the shelf" after market exhausts, but there are some available for the 5efe engine, obx and pacesetter, which is the same engine apart from the block being 10mm taller which do fit and have been used succesfully by some members. The only other option is custom but withouit trial there would be no guarenteed benefits!!!