Hot selling intake exhaust valves 03H 109 601/611 for Q7/3.6/CC/3.0

Hot selling intake and exhaust valves with OE numbers 03H 109 601 and 03H 109 611 are essential engine valve components compatible with Audi Q7 3.6L and Volkswagen CC 3.0L models. Manufactured with high-temperature resistant alloy steel and precision vacuum heat treatment technology, these valves feature excellent high-temperature oxidation resistance, wear resistance and fatigue resistance. They can withstand the extreme high temperature and high pressure inside the engine combustion chamber for a long time, accurately open and close to control the intake of mixed gas and the discharge of exhaust gas, ensuring smooth engine air intake and exhaust circulation, stable power output, sufficient torque and normal fuel combustion efficiency.

If the intake and exhaust valves suffer from ablation, sealing surface wear, carbon deposition deformation or valve stem wear, vehicles will experience insufficient power, unstable idling, increased fuel consumption, abnormal engine knocking noise, blue smoke or black smoke exhaust, and even cylinder compression pressure drop leading to engine overhaul. Each valve undergoes precision dimensional inspection, air tightness test, high-temperature durability and surface hardness testing to guarantee stable sealing performance and long service life. Processed strictly according to OEM sizes, they support direct replacement installation without modification, greatly saving engine repair time and labor cost. We keep sufficient spot inventory and support bulk wholesale and global fast shipment. Highly recognized by repair shops and auto parts distributors, these engine valves are reliable aftermarket replacement parts for engine overhaul of Q7 3.6 and CC 3.0.