I used one of their manifolds recently and worked like a charm. Need to do a little fitting on it when you put it on the unit so all fits correctly. There are several castings to be fit together to have it bolt up properly. The castings even have the part number and the eagle logo on them. Really worth the money (and is not cheap), but sure makes the tractor look and sound correct. Here is picture as installed on a 12/20 that was recently completed.