Limited production exhaust manifold. This was originally made for the HP 20 and 40, but it also fits OS FSR40 and 45, Early Royal and Thunder Tiger 40, 45 with the bolt on (threads in the case) muffler.
Use this manifold with a silicone exhaust tube or copper bend tubes also listed in our limited supply section. Includes 2 high temp o-rings and two 3mm screws.
Spacing is 1.102" (28mm)