MG/别克/荣威/上汽MAXUS/雪佛兰 铱金火花塞 12673527 ARK-SP7115

MG, Buick, ROEWE, SAIC MAXUS, Chevrolet models with 12673527 ARK-SP7115 iridium spark plugs; iridium electrode provides higher temperature resistance and corrosion resistance than OEM nickel alloy; center electrode thinner for concentrated ignition energy; life up to 80,000-100,000 km. Laser-welded and rigorously resistance-tested for consistency; OEM 12673527; fits Buick Excelle/X-ray, ROEWE 550 and other post-2000 models. Function: ensure complete combustion, reduce carbon buildup, boost low-end torque and acceleration; installation difficulty medium; requires special tools.