APR EA825/EA839/9A2 Iridium Pro Spark Plug - Heat Range 10 - 12mm x 26.5mm x 14mm - SINGLE
Refresh your ignition system in one shot with APR Iridium Pro Spark Plugs and pair with APR Ignition Coils – engineered to work together for a stronger, more consistent spark. Each is a direct-fit upgrade designed to support smoother idle, sharper throttle response, and reliable performance under heat and load—whether you’re stock or running higher boost and power upgrades.
Features & Benefits
- 152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum.
- Heat range 10 spark plug (Similar: Bosch 2, Brisk 8, Denso 31, and NGK 10)
- 1 step colder older than OEM (2.9T/3.0T EA829, 2.0T/2.5T/3.0T/3.7T 9A2)
- Optimized electrode design for hard to ignite fuels, such as ethanol
- Designed for high performance / tuned vehicle applications
- Cooler operating temperature than stock plugs
- Resists preignition better than stock plugs
- An excellent match for APR ignition coils
- 2 steps colder than OEM (4.0T EA825)
- Stronger than copper and platinum
- Perfect for upgraded APR vehicles
- Lower required supplied voltage
- Non-projected insulator design
- Supplied Gap: .55mm +- .05mm
- Insulator Material: Ceramic
- Thread diameter: 12mm
- Install Torque: 17 Nm
- Thread reach: 26.5mm
- Seat Type: Gasket
- Made in the EU
- Hexagon: 14mm
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Excluded from Policy: Clearance, Closeout, Used, Refurbished or Open-box items.
Typical order handling and processing time is 24 hours for orders placed Monday through Friday. We do our best to ship orders immediately but we reserve the right to take up to four (business) days to ship in-stock products. Business days are Monday through Friday; orders are not guaranteed to be processed on weekends. Orders placed after 3pm EST will be processed the following business day, regardless of the shipping method. Additionally, UPS/FedEx delivers ALL orders Monday thru Friday, regardless of the shipping time. If you need an order to be delivered on a Saturday (this applies to Next Day Air orders only), there is a $20 Saturday delivery fee, and this can only be arranged for by calling in and placing your order over the phone.
For out of stock items, or special ordering please give us a call at (510) 359-7232
WARNING: May contain items that are found to have compounds and/or chemicals known to the State of California to cause cancer, birth defects, and reproductive harm. For more info, please visitP65Warnings.ca.gov
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