Brand:OSVAT, QUEEN, DOKURO Intake Valve (CATERPILLAR 3304NT) Engine NO. : 3304NT Model: CATERPILLAR IN/EX: ... resistance. 2, Material: Heat-resistant steel alloy 1) Intake Valves: 40Cr, 4Cr9Si2 2) Exhaust Valves: 4Cr9Si2(SUH1) , 21-4N(SUH35) We could supply ... , isuzu, lada, honda, gm, ford, daihatsu, chrysler, audi, etc. engine valves