HKS 50003-M40X Spark Plug 8 M12 ymm_67 there is an additional heat

there is an additional heat shield with a gold reflective layer on the exhaust manifold side which effectively combats the radiant heat transfer

Jetta (A7) GLI

2000-2002 Audi S4 Wagon 2

Constructed from five layers of silicone with embedded heat-resistant fibers

HKS 50003-M40X Spark Plug 8 M12 ymm_67 there is an additional heatHKS M Series Super Fire Racing spark plugs are high performance Iridium plugs designed to handle advanced levels of tuning and provide Improved ignition performance, durability and anti carbon build up. The Iridium alloy is used because of its durability and reliability. On an average plug, a narrow core typically shortens life span of plug but with the intense durability of iridium there is no sacrifice in any longevity. With a high melting point of