For some reason I have TWO left hand manifolds on my 455. Was wondering if someone could give me some information on them. They are in pretty nice shape. Have no idea what they're worth. Truck currently has manifolds only. No downpipes. Yeah.....

Markings:

GM 384785 LH
*D has heat riser

GM 384785 LH

*D no heat riser.

 

These are for the 65-70 full size cars with single exhaust. It's common to use two of these LH side manifolds in swap applications that require center dumps.