A new custom intake manifold that was originally designed for American IronHorse choppers. We believe this was designed for 113" American IronHorse engines, except the California models. You may be able to use this for custom applications as well. **We received this through a dealer buyout and all of the information we have on it is listed here. The pictures show the manifold from various angles. In the fifth picture you can see where the manifold reads: 107-45, 7981006. This was in a box which had the American Iron Horse part #K21003801 on it. We were unable to find any information about this in our dealer catalogs. **If you look at the fifth picture, going across the top of the manifold, at its narrowest point, it is approximately 3.276". At the bottom, across its widest point where it goes through or close to the part number cast into the part 7981006, it is approximately 4.717" at its widest point. Please note that these measurements are not really accurate because were trying to measure the widest and narrowest points at the top and bottom and we may not have got it right at the exact narrowest or widest points. If you look at the fourth picture, the big round spigot where the carburetor goes on, the inside diameter is approximately 1.931" and the outer diameter is approximately 2.065". **Please note: We acquired this through the buyout of American Iron Horse and unfortunately were unable to obtain the parts catalogs. AIH had their catalogs online; however when the company went bankrupt the websites were shut down; however there are some American Iron Horse dealers who still have the hard copies of the catalogs. You may be able to contact these dealers and inquire about additional information on this manifold. We unfortunately have no additional information other than that listed here. **We searched for part #K21003801 and found the site which listed the AIH items which were being liquidated when the company went out of business. The only information this site provided was this part number is for a manifold for non-California 113" motors. We do not know what specific motors this will fit therefore we suggest you try contacting American IronHorse dealers who may still have catalogs. **What you see in the pictures is what you will receive. Aside from the manifold there is nothing included with this at all. Anything else required to mount this will have to be provided separately. **This is new and in good shape. Aside from the small nick you see in the last picture we did not see any damage on this at all.