- C1 C2 Corvettes - 327 Exhaust Manifold Identification - I picked up a pair of 2 1/2 ramshorn manifolds this weekend. They are in really good . - In part 1 we 'll identify and then in part II we 'll install. First let 's look '57 exhaust manifolds and the part numbers for the heat risers found on the..Factory exhaust manifolds are fully interchangeable between Mark IV, Gen V, and Gen VI It belongs on the driver 's side of a 1970-1974 454 Corvette back of the manifold and may help identify the year, but not necessarily the application..
190 rows Chevy exhaust manifold Identification - Chevy ramhorn casting numbers, Big Block chevy exhaust manifolds.Find great deals on eBay for corvette exhaust manifolds. Shop with confidence..Find great deals on eBay for corvette exhaust manifold. Shop with confidence..Exhaust Manifold Notes Exhaust manifold casting dates may not be visible when manifold is installed, and some manifolds may not include a casting date. casting date codes are as described for engine blocks, except they do not normally carry a .