Dear Leroy;

That's a factory "split manifold" & only made for the Corvette in 1953-54. The (original) Fenton manifold was similar & then they went to the headers we have now.

Both are quite rare today and have sold on e-bay @ $200+ (Vette) and over $600 for the Fenton.

In the late 50s you could buy one for $44.00 at the local Chevrolet Dealer.

They work great too as mentioned.

Good luck. \:\)

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon