RB’s new .21 Rocket engine is the follow-up model of the long-running and now sold out Blast line of engines. The limited edition piece is of a long stroke design, it offers a 14.5mm lightened and balanced turbo crankshaft, a 7-port multi-exhaust liner, a lightweight piston and a strong competition conrod. The composite slide carburettor comes with three 6mm to 8mm venturi inserts and the black-coated crankcase is equipped with a 14.5mm high-speed bearing and topped by a new 60mm orange anodised and laser-engraved cooling head. The engine is available separately or including an EFRA 2097 in-line pipe and manifold set.