V-Power Spark Plugs are named for their specially designed v-groove center electrode to improve ignitability. Tested to the highest original equipment standards, these plugs are crucial for vehicle maintenance.
Features & Benefits:
- Cold-rolled threads prevent cross-threading and damage to cylinder heads
- Trivalent Metal Plating has superior anti-corrosion and anti-seizing properties (eliminates need for anti-seize)
- High-grade alumina silicate ceramic creates a stronger insulator to reduce dielectric punch-through (caused by spark exiting through side of ceramic)
- 98% pure copper core increases heat dissipation for reliable starts and prevents spark plug overheating
- 90 degree V-Groove center electrode allows the spark to occur closer to the outside of both the center and ground electrodes for better flame expansion, reducing quenching and improving ignitability
OEM / Interchange Numbers: 2240120J07, 3922, 4776, 6097, 9004851161, 9004851161000, 980795787C, BKR7EE, BP5118110
| NGK 4644 Specifications | |
|---|---|
| Center Electrode Core Material | Copper |
| Center Electrode Design | Standard |
| Center Electrode Insulator Tip Projection | 0.12 IN; 3.0 MM |
| Center Electrode Projection | Mid Projection |
| Center Electrode Tip Material | Nickel |
| Electrical Terminal Type | Non-Removable Nut |
| Ground Configuration | J-Gap |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | Standard |
| Ground Electrode Tip Material | Nickel |
| Hex Size | 5/8" (16mm) |
| Insulator Height | 1.99 IN; 50.5 MM |
| Insulator Material | Ceramic |
| Manufacturer Heat Range | 7 |
| Material Grade | Nickel/Copper |
| Part Number | BKR7E |
| Pre-Gap Size | .036 IN; 0.9 MM |
| Reach | 0.750 IN; 19.0 MM |
| Resistance | 5000.0 82 |
| Resistor Type | Yes |
| Seat Type | Flat |
| Service Number | BKR7E |
| Short Style Spark Plug | No |
| Skirt | No |
| Skirt Length | 0.0 IN; 0.0 MM |
| Stock Number | 4644 |
| Thread Size | M14 - 1.25 |
| Thread Type Standard | Metric |
| Washer Type | Crush |
| Washer(s) Included | Yes |