Trade numbers:

• ZR 6 SPP 3320

• 8174-4

Bosch Double-Platinum Spark Plug

The Bosch double platinum spark plugs have platinum firing pins at both the centre and a ground electrode. Developed to OE specifications and designed for better performance and life.

Features and Benefits:

Outstanding spark plug technology which meets exactly the requirements of the respective engine.

Fine wire 360 degree continuous laser welded platinum firing pins and a yttrium enhanced tapered platinum ground electrode inlay for improved combustion and service life.

Large copper core center electrode enables an improved heat transfer.

Nickel-plated housing and thread for protection against corrosion and seizure in the aluminum cylinder head without the need for lubrication.

Factory pre-set electrode gap enables hassle-free replacement.

Note: Always use the Bosch installation guide when replacing your spark plugs.