BUILT FOR PERFORMANCE: Dinan Iridium Pro Spark Plugs are made from high-grade materials, engineered to enhance ignition and combustion, and provide smooth, consistent engine power for daily drivers, dedicated BMW racing enthusiasts, and everyone in between.
A DIRECT-FIT UPGRADE: Upgrade your OEM spark plug on stock vehicles and on tuned engines with higher boost or upgraded power components, Dinan spark plugs are engineered to manage increased demands. Direct replacement for stock OEM parts 12120040551, 12122455258, 12120046646 & 12125A4EF60
IRIDIUM BENEFITS: One of the strongest materials used for spark plugs, Iridium is used to withstand high temps, is less corrosive, requires less voltage to product a strong spark, and helps deliver reliable power.
HIGH-TEMP DURABILITY (HEAT RANGE 9): Featuring a copper core construction paired with an iridium electrode, Dinan's high heat dispersal “cold plugs” regulate combustion temperatures. This means consistent performance, even under extreme conditions.
COMPATIBILITY: BMW S58, Gen 1 B48, and Gen 1 & 2 B58 engines. Dinan spark plugs dissipate heat more effectively than stock; perfect for both stock and upgraded engines.
MORE POWER WITH DINAN: Pair Dinan spark plugs with Dinan ignition coils for maximized performance. D640-0001 works with Ignition Coil Part Numbers D650-0008 D650-0009 & D650-0010.
TRUSTED IN THE U.S. FOR OVER 45 YEARS: Founded in 1979, Dinan is well-established as a leader in BMW parts manufacturer in America. Quality products and solid engineering have made Dinan a household name among BMW enthusiasts worldwide.