COBB Tuning One Step Colder Spark Plugs Subaru 2006-2014 WRX / 2004-2021 STI

This is the factory spark plug as installed in the 2018 Subaru WRX STI Type RA and 2019 Subaru WRX STI. The main differences are a heat range that is one-step cooler as well as a slightly tighter gap than previous factory spark plugs. These serve as a factory replacement for the 2018 STI Type RA and 2019 STI and a great upgrade for modified 2.5L Turbocharged Subarus.

Why?:
A good quality spark plug goes a long way in ensuring your car's engine is running smoothly. For years, tuners have been using an alternate solution on cars that needed a tighter gap and cooler heat range. Now available as an off-the-shelf plug, this takes the guess work out of replacing or upgrading your Subaru's spark plugs.

Features:
- Laser Welded Iridium Tipped Center Electrode
- Trivalent Metal Plating
- .024 (.6mm) Gap
- Heat Range : 7
- Sold as Set of 4
- 2.5L Subaru Fitment

Notes:
Sold as a set of 4

Applications:
2006-2007 Subaru WRX
2004-2007 Subaru STI
2008-2014 Subaru WRX
2008-2014 Subaru STI
2015-2021 Subaru STI
2004-2014 Subaru Forester
2004-2014 Subaru Impreza
2005-2009 Subaru Legacy GT
2005-2009 Subaru Outback XT