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.
14X26.5X16MM - Heat Range 9
- 152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum.
- Heat range 9 spark plug (Similar: Bosch 3, Brisk 10, Denso 27, and NGK 9)
- 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
- Stronger than copper and platinum
- Perfect for upgraded APR vehicles
- Lower required supplied voltage
- Non-projected insulator design
- Thread diameter: 14mm
- Install Torque: 25 Nm
- Thread reach: 26.5mm
- Seat Type: Gasket
- Made in the EU
- Hexagon: 16mm
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| Air Freight Prohibited: false |
| Not Carb Approved: false |
| Carb Acknowledgement Required: false |
| Ltl Freight Required: false |
| Prop 65: Y |
| Part Type: automotive |
| Epa: N/A |
| Regular Stock: true |
| Units Per Sku: 1 |
