I recently grabbed these from an old dealers attic. My research shows them fitting various 70 and 71 383 and 440 low performance applications. The right one fits LP 4 barrel 440's. I am not sure if this is a pair ordered for the same job or not. The right has the computer card with number 2899954 which is the actual part number in my book. t has a casting number of 2899876-3. The left one has a casting number of 2951861-5. I found part number 2951860 in my book. It is probably the actual...
70 71 383 449 NOS exhaust manifolds low perf
