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NGK 3725 Spark Plug
| Brand | NGK 3725 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .028 |
| Ground Electrode Quantity | 1 |
| Hex Size | 13/16 |
| Insulator Height | 55.00 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach | .5 |
| Thread Diameter | 14.00 |
| Part Number | Bpr8hs |
| Stock Number | 3725 |
| Fits | — |
OE supplier pedigree. Built to original equipment standards for dependable performance.
Copper core. Helps promote consistent ignition performance.
Standard spark plug. A direct replacement for routine ignition service.
Cross-references AMS Automotive 4183, AMS Automotive 4188 and BBB Industries 3725 for the same application. See all 15.
NGK BPR8HS Standard Spark Plug
The NGK BPR8HS standard spark plug is built for dependable ignition performance in a wide range of domestic and import applications. As part of NGK’s Standard Spark Plug line, this plug uses a copper center electrode core, nickel center electrode tip, and nickel ground electrode materials for consistent spark delivery and stable operation.
With a 0.028 pre-gap, 14 mm thread diameter, 0.5 reach, flat seat, and removable nut terminal, the NGK 3725 is a practical OE-style replacement for engines that call for this specification. It is a direct service part for applications such as Honda Civic and other vehicles that require the BPR8HS configuration.
Key Features
- NGK Standard Spark Plug line for everyday ignition service
- Part number 3725, NGK BPR8HS
- Copper center electrode core for reliable conductivity
- Nickel center and ground electrode tip materials
- 5000 ohm resistance for ignition system noise control
- 0.028 pre-gap for specified applications
- 14 mm thread diameter, 0.5 reach, flat seat
- 13/16 hex size with removable nut terminal
- Heat range 8 for the specified engine application
Product Details
NGK has long supplied original equipment spark plugs for domestic and import vehicles in North America, and the BPR8HS follows that OE-focused approach with a standard design and proven materials. The copper core helps support efficient heat transfer, while the nickel electrode construction provides dependable service in engines that call for this plug style. If you are replacing worn plugs on a Honda Civic or another vehicle listed for this application, the NGK 3725 offers the correct dimensions and terminal style for a proper service replacement.
This part cross-references BBB Industries 3725 for the same application.
What It Helps Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from weak or inconsistent spark output
- Misfire conditions related to plug wear or incorrect gap
- Poor throttle response from degraded ignition performance
- Maintenance replacement for engines requiring BPR8HS specifications
Installation Notes and Tips
Verify the engine calls for NGK BPR8HS / 3725 before installation. Check the plug gap against the vehicle service specification, inspect the ignition coil and plug wire condition, and confirm the seat type, reach, and thread diameter match the cylinder head. For Honda Civic and similar applications, follow the manufacturer’s torque specification and service interval recommendations.
Quality Assurance
NGK is a major OE spark plug supplier with decades of automotive manufacturing experience. The brand’s North American and global production and distribution network supports consistent product availability and OE-level manufacturing standards for ignition service parts.
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