The displacement is roughly the same .
Traxxas designed the 2.5 from the ground up with a refined crankcase , cooling head , port timing , and other components to produce more power , in line with expensive aftermarket offerings .
Although the displacement is roughly the same , Traxxas designed the 2.5 from the ground up with a refined crankcase , cooling head , port timing , and other components to produce more power , in line with expensive aftermarket offerings .