Skip to content

NGK Iridium Spark Plug Set Stock Heat 2006-2014 WRX / 2004-2021 STI / 2005-2009 LGT / 2004-2008 FXT

by NGK
SKU 6619
Save 40% Save 40%
Original price $73.23
Original price $73.23 - Original price $73.23
Original price $73.23
Current price $43.80
$43.80 - $43.80
Current price $43.80

NGK Iridium IX Spark Plugs are designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling.

The Fine Iridium tip ensures high durability and a consistently stable spark. Iridium alloy has extremely high melting point, perfect for today's high-tech, high-performance engines. Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties. Outstanding acceleration, high fuel efficiency and durability. Ultimate design, technology and performance.


 Note: Spark Plugs are sold as a set of 4.

Customer Reviews

Based on 8 reviews
Eli Brown
Stage 2+ plugs

These plugs significantly improved my engine so good to the point where I did get a check engine light about my catalytic converter running high on my accessport and it had me upgrade the map to a stage 2 91 octane map which made my ej20x run really good so I very highly recommend these spark plugs!


Thank you for sharing your experience with the NGK Iridium Spark Plug Set! It is great to hear that these spark plugs have made a significant improvement in your engine's performance. NGK Iridium spark plugs are known for their quality and ability to enhance engine efficiency. Thank you for your 5 Star Review! Enjoy your upgraded engine performance!


Jacob Pawlak

Second replacement with the same spark plugs. Always great products from subimods and I’m happy to support them with my business. Fast shipping as always and product came perfectly in tact. Thank you.


Thank you for your continued support and for choosing NGK Iridium Spark Plugs from Subimods. We are pleased to hear that you have had a positive experience with these spark plugs and that you have found Subimods to be a reliable source for your automotive needs. If you ever have more to share or require assistance in the future, do not hesitate to reach out. Thank you for your 5 Stars! Safe and enjoyable driving with your Subaru!


Nicholas Drizos

came fast and correct


We appreciate your 5 Star Review of the NGK Iridium Spark Plug Set! I am glad to hear they arrived quickly and were exactly what you were looking for! Enjoy!


Matt W
Spark plugs

Great price and work as expected! Can’t go wrong with NGK


Thank you for taking the time to leave a 5 Star Review of the NGK Iridium Spark Plug Set Stock Heat! Like you said, you can't go wrong with NGK!


Mike Wazalski
W spark plugs

Always NGK. Fast shipping great service. 10 out of 10 would recommend 😘


We appreciate your 5 Star Review of the NGK Iridium Stock Heat Spark Plug Set!


Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare