Generic 4pcs Double Iridium Spark Plug D-4759, 12mm Thread 19mm Reach 16mm Hex, Replaces IKR7D ZKR7A-10 SXU22PR9 IXU22 VXU22 90048-51200 DCPR7EIX-P IRIMAC8, 0.8mm Gap

1. Premium Double Iridium Construction for Maximum Performance – Features laser-welded fine-wire iridium center electrode (0.4mm) and iridium ground electrode, delivering superior spark concentration and ignition reliability. The double iridium design offers exceptional durability with a melting point over 2400°C, providing up to 4 times longer service life compared to standard nickel plugs.

2. Direct Replacement for Multiple OEM Part Numbers – Specifically engineered as a direct replacement for a wide range of spark plug models. Replaces IKR7D, ZKR7A-10, SXU22PR9, IXU22, VXU22, 90048-51200, 90048-51199, DCPR7EIX-P, IRIMAC8, DCR7EIX, DCPR7EIX, and many other compatible applications. (Compatible replacement parts, not original equipment products.)

3. Precision Engineered Specifications for a Perfect Fit – Features 12mm x 1.25mm thread diameter, 19mm thread reach, 16mm hex size, heat range 7, and preset gap of 0.8mm (0.031 inch). Flat gasket seat design ensures proper sealing for reliable performance in a wide range of automotive applications.

4. Optimized Combustion for Improved Engine Response – The fine-wire iridium center electrode requires lower voltage for ignition, resulting in more complete combustion. This helps restore smoother acceleration, improved throttle response, reduced misfires, and better overall fuel economy for your engine.

5. Integrated 5k Ohm Resistor for Stable Operation – Equipped with a built-in 5k Ohm resistor to suppress electromagnetic interference (EMI) and radio frequency interference (RFI). Helps prevent ignition noise from affecting vehicle electronics and ensures stable engine operation.

Upgrade your vehicle's ignition system with this premium 4-piece set of double iridium spark plugs. Designed as a direct replacement for a wide range of 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. The high-strength iridium alloy resists corrosion and wear, ensuring reliable performance and a longer service life—up to 4 times longer than conventional copper plugs.

**Technical Specifications:**| Specification| Details||---------------|---------|| Model| D-4759|| Electrode Material| Double Iridium|| Thread Diameter| 12mm x 1.25mm (M12)|| Thread Reach| 19mm (3/4 inch)|| Hex Size| 16mm (5/8 inch)|| Preset Gap| 0.8mm (0.031 inch)|| Heat Range| 7|| Resistor| 5k Ohm|| Seat Type| Flat Gasket|| Terminal Type| Fixed SAE|| Quantity| 4 Spark Plugs|

**Replaces Compatible Spark Plug Models (including but not limited to):**

NGK: IKR7D, ZKR7A-10, DCPR7EIX-P, DCPR7EIX, DCR7EIX, IRIMAC8, KR7AI, PKR7A

DENSO: SXU22PR9, IXU22, VXU22, IXU24

OEM: 90048-51200, 90048-51199, 90048-51188

Also compatible with ZKR7A, D-4759, 4759 series

**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 7 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 0.8mm, verify before installation)

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

7. Tighten to manufacturer's recommended torque specification (typically 15-22 Nm / 11-16 ft-lbs)

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 50,000-60,000 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