COBB [04-14 WRX, 04-21 STI, 05-09 Legacy GT/Outback XT, 04-13 Forester XT] 2.5L Spark Plug Set – One Step Colder

The COBB 2.5L Spark Plug Set provides a one-step-colder heat range and tighter preset gap for modified turbocharged Subaru engines, serving as a factory replacement for the 2018 STI Type RA and 2019 STI while supporting a broad range of 2.5L WRX, STI, Legacy GT, Outback XT, and Forester XT applications.

• Fits 20042014 Subaru WRX and 20042021 Subaru WRX STI, including Type RA and S209
• Fits 20052009 Subaru Legacy GT and 20052009 Subaru Outback XT
• Fits 20042013 Subaru Forester XT
• Laser-welded iridium-tipped center electrode
• Trivalent metal plating for corrosion resistance
• 0.024 in (0.6 mm) preset gap and heat range 7
• Sold as a set of four
• Product code: D44700
• References: COBB Subaru 2.5L Spark Plugs product page