Description
New from Hasi Tuned, the engine brand fronted by leading Swiss nitro racer Silvio Hächler, are these two different underhead options for .21 1:8 Onroad & 1:8 GT engines. They have a different shape especially designed for improved performance with new types of fuel. They offer a better fitting on Hasi Tuned & O.S. Engines sleeves with one specifically for 25% Nitro content fuel and one for 16% use.
