Rickside Design O.S. engines low-profile cooling head
Coming from Rickside Design and made for a range of O.S. nitro engines is the Nitro Shock low-profile cooling head. The silver colour head sports Rickside Design graphics and it is usable on the O.S. Max-21 XZ-B Ver.2, the O.S. Speed XZ-B Spec 2 and Spec 3 as well the O.S. Speed B2101 and B2102 engines.
Source: Rickside Design [ricksidedesign.com]