We recommend NGK R7438-8 (4905) Racing Spark Plugs for vehicles with 50% more turbo boost pressure than factory configurations. The R7438-8 Racing Spark Plug features an Iridium slant tip center electrode with Platinum ground electrode, and are also one-step colder than factory Volvo spark plugs, which is preferred for highly modified and tuned vehicles.
NGK Racing Spark Plugs are designed for extreme use in mind, and meant to withstand the most grueling race conditions. The center electrodes of NGK Racing Spark Plugs have special configurations and designed to ensure spark reliability and durability.
NGK R7438-8 Racing Spark Plug Features:
- Center electrode core material: Copper
- Center electrode tip material: Iridium
- Ground Configuration: Slant
- Ground Electrode Core Material: Platinum
- Ground Electrode Tip Design: Pin Type
- Pre-gap Size: 0.028 inch
- Reach: 26.5mm
- Heat Range: 8
For highly modified and tuned vehicles that run over 22psi of turbo boost pressure
- 2004 - 2007 S60R, V70R. B5254T4
- 2005 - 2009 S60 T5, B5244T5
- 2004.5 - 2010 S40/V50 T5 AWD and FWD, B5254T3
- 2006+ C70, B5254T3
- 2007+ C30, B5254T3
Spark plugs are priced and sold individually.