S&S Knucklehead Rocker arm housing polished

Polished sand cast aluminum finish. Reproduction of the OEM front & rear rocker arm housings, perfect for restaurations. Replaces front OEM 90-36 (36-47 Knuckle) Replaces rear OEM 91-36 (36-40 Knuckles) and 91-41 (41-47 Knuckles) housings.

Fits: > 36-47 Knucklehead; S&S KN-series engines