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NGK 4730 Spark Plug
| Brand | NGK 4730 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Stud |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .028 |
| Ground Electrode Quantity | 1 |
| Hex Size | 18 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 12.00 |
| Part Number | Dpr8z |
| Stock Number | 4730 |
| Fits | — |
OE legacy. Built to original equipment standards for dependable performance.
Copper core. Helps promote efficient spark delivery and consistent ignition.
Standard spark plug. A direct-fit ignition component for routine replacement.
Cross-references AMS Automotive 4106, AMS Automotive 4730 and 98061-58616 for the same application. See all 5.
NGK DPR8Z Spark Plug Overview
The NGK Standard Spark Plug 4730 is built for dependable ignition performance in a wide range of domestic and import applications. As an NGK spark plug, part number 4730, it uses a copper center electrode core with a nickel center tip and a nickel ground electrode tip for consistent spark delivery.
Compatible With select Honda Civic and other vehicle applications that call for NGK DPR8Z, this plug is designed around a flat seat, 12 mm thread diameter, 0.75 reach, and 18 mm hex size. The 5,000 ohm resistor helps control electrical noise in the ignition system.
Key Features
- NGK Standard Spark Plug, part number 4730
- NGK DPR8Z cross-reference application
- Copper center electrode core with nickel tip
- Nickel ground electrode with standard configuration
- 5,000 ohm resistance for ignition noise suppression
- Pre-gapped to .028 for specified applications
- Flat seat design with 12 mm thread diameter and 0.75 reach
- Stud terminal type and 18 mm hex size
Product Details
NGK has long supplied original equipment spark plugs for domestic and import vehicles in North America, and this Standard Spark Plug line reflects that OE-focused approach. Part 4730 is engineered to meet original equipment-style requirements for vehicles that specify the DPR8Z configuration, including applications such as Honda Civic and other makes and models that use this plug specification. This part cross-references AMS Automotive 4106 and 4730 for the same application.
Common Issues This Plug Can Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from inconsistent ignition spark
- Misfire conditions related to degraded plug electrodes
- Reduced throttle response from weak spark delivery
- Ignition noise concerns in resistor-equipped systems
Installation Notes
Verify the required plug specification before installation, including thread diameter, reach, seat type, and heat range. The pre-gap size is .028, but the final gap should always be checked against the vehicle service specification for the exact application. Use proper spark plug removal and installation procedures to avoid thread damage in the cylinder head.
Quality Assurance
NGK manufactures spark plugs for a broad range of automotive, motorcycle, marine, and small engine applications, with North American OE supply experience and global production and distribution support. Part number 4730 is built to original equipment standards for durability and operational performance in the applications that call for NGK DPR8Z.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| No rows match your filter. | ||||