... the best for the best engine combustion efficiency, especially for band with adjustable high-performance spark plug engine, for both turbo ... % year on year; 3, burning completely, to reduce exhaust emissions; 4, to reduce or eliminate engine idling shivering phenomenon;5, eliminating ... ; 6, heat resistance, waterproof design. Universal ignition amplifier engine 3 4 6 cylinder (Black , bule ,red)