mystery seemingly nonexistent chevy exhaust manifold casting number.

[billyredneckdipper]

Just took the stock manifold s off for headers and thought i would look up well try to look the manifods up just for the hell of it, well 4hours later NOTHING the only thing i found was s post by a member of the chevelle site stating fhe same problem..casting number 3984040

Whats up with fhis? Rare millon dollar manifold! Doubtfull but hey who knows i doubt md and another person are missreading thw same exsact wromg numbers.

Good luck