The cylinder head intake and exhaust ports and intake and exhaust manifolds are shape optimized for superior volumetric efficiency. Mitsubishi reduced the friction in the engine by together with elastic grinding on the valve stems, adopting a higher-effectiveness shroud equipped plastic impeller from the h2o pump and applying 0W-20 lower-viscosity https://4b12-engine-swap45123.bloggip.com/31418713/considerations-to-know-about-4b12-engine-swap