Generic 4pcs Double Iridium Spark Plug SK20BR11, 14mm Thread 19mm Reach 16mm Hex, Compatible with 90919-01230 90919-01226 1AZ-FSE 2AZ-FSE 1JZ-FSE Engine

1. Premium Double Iridium Construction for Superior Performance – Crafted with laser-welded fine-wire iridium center electrode (0.4mm) and iridium ground electrode, delivering a strong, concentrated spark for more complete combustion. Iridium alloy is six times harder and eight times stronger than conventional platinum, providing exceptional durability and consistent spark performance under all operating conditions.

2. Direct Replacement for Multiple OEM Part Numbers – Specifically engineered as a direct replacement for compatible spark plug applications. Replaces OEM part numbers including 90919-01230, 90919-01226, SK20BR11, 3471, 067700-3560, 4504, 4702, IK20TT, PK20TT, K6RTJPP, PFR6W-TG, and 5547. (Compatible replacement parts, not original equipment products.)

3. Precision Engineered Specifications for a Perfect Fit – Features 14mm x 1.25mm thread diameter, 19mm thread reach (3/4 inch), 16mm hex size (5/8 inch), heat range 20/6, and preset gap of 1.1mm (0.043 inch). Tapered seat (conical) design ensures proper sealing for reliable performance in compatible engines.

4. Optimized Combustion for Improved Engine Response – The fine-wire iridium center electrode requires lower voltage for ignition, resulting in more complete combustion. Helps restore smoother acceleration, improved throttle response, reduced misfires, and better overall fuel economy. The built-in 5k Ohm resistor suppresses electromagnetic interference (EMI) for stable engine electronics.

5. Wide Compatibility with Toyota Engines – Specifically engineered for vehicles equipped with 1AZ-FSE, 2AZ-FSE, 1JZ-FSE engines, and other compatible applications. Ideal for routine maintenance to keep your engine running at peak performance. Recommended tightening torque: 22 Nm.

Keep your engine running at peak performance with this complete 4-pack of double iridium spark plugs. Designed as a direct replacement for compatible applications, these high-performance spark plugs deliver reliable starts, smooth acceleration, and improved combustion efficiency.

Double iridium spark plugs offer significant advantages over standard nickel or single iridium plugs. The fine-wire iridium center electrode (0.4mm) and iridium ground electrode provide a more concentrated and consistent spark, requiring lower voltage for ignition. This leads to more complete combustion, smoother acceleration, improved throttle response, and better overall fuel economy. Denso's patented iridium alloy is six times harder and eight times stronger than conventional platinum, ensuring reliable performance and a longer service life.

**Technical Specifications:**| Specification| Details||---------------|---------|| Model| SK20BR11 / 3471|| Electrode Material| Double Iridium|| Thread Diameter| 14mm x 1.25mm (M14)|| Thread Reach| 19mm (3/4 inch)|| Hex Size| 16mm (5/8 inch)|| Preset Gap| 1.1mm (0.043 inch)|| Heat Range| 20 (DENSO) / 6 (NGK)|| Resistor| 5k Ohm|| Seat Type| Tapered / Conical|| Terminal Type| Solid SAE|| Tightening Torque| 22 Nm|| Quantity| 4 Spark Plugs|

**Replaces OEM Part Numbers (including but not limited to):**

90919-01230, 90919-01226

SK20BR11, 3471, 067700-3560

4504, 4702, IK20TT, PK20TT

K6RTJPP, PFR6W-TG, 5547, 101 905 621 A/B

IFR6A11T, KJ20SR11

**Compatible Applications (including but not limited to):**

1AZ-FSE (2.0L VVT-i engine)

2AZ-FSE (2.4L engine)

1JZ-FSE (2.5L VVT-i engine)

Compatible with vehicles requiring SK20BR11 or 90919-01230/01226 specifications

**Key Performance Benefits:**

Double iridium electrodes for exceptional durability and consistent spark

Fine-wire design (0.4mm) for lower voltage requirements and more complete combustion

5k Ohm resistor suppresses electromagnetic interference for stable electronics

Pre-gapped to factory specifications for straightforward installation

Heat range optimized for a wide variety of engine types

**Installation Instructions:**

1. Allow the engine to cool completely before starting

2. Disconnect the negative battery cable

3. Remove the ignition coil or spark plug wire from the old spark plug

4. Use a 16mm (5/8 inch) spark plug socket to remove the old plug

5. Check the gap of the new plug (preset to 1.1mm, verify before installation)

6. Hand-thread the new plug into the cylinder head to avoid cross-threading

7. Tighten to recommended torque specification (22 Nm)

8. Reconnect the ignition coil or spark plug wire

9. Repeat for all cylinders

10. Reconnect the battery and start the engine to verify proper operation

**Recommended Maintenance Schedule:**

Inspect spark plugs every 60,000 km

Replace spark plugs every 100,000-120,000 km depending on usage

Double iridium spark plugs offer significantly extended service life compared to standard plugs

**Package Includes:**

4 x Double Iridium Spark Plugs