NGK® 4901 Spark Plug
Manufacturer #4901
NGK® 4901 Spark Plug
Manufacturer #4901
$49.13
$68.78
Save $19.65 (29%)
(45) In Stock
Get it between Wed, Aug 20 - Fri, Aug 22, 2025
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Only secure payments| SKU | NG4901 |
|---|---|
| Brand | NGK® |
| Part Name | Spark Plug |
| Part | # 4901 |
| Quantity Per Vehicle | 1 |
| Pack of | 1 |
| Condition | New |
- DESIGNED FOR RACING: Fine wire center electrode provides consistent performance
- NGK Racing Spark Plug
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
- NGK Racing spark plugs are designed with extreme use in mind and meant to withstand the most grueling racing conditions. NGK Spark Plugs have been powering racing champions and can be found in every racing venue throughout the world. The center electrode of the NGK Racing spark plugs has special configurations and designs to ensure durability and ignitability. NGK Racing plugs bring ultra high performance in a variety of heat ranges. Special configurations are used for a wide variety of racing applications.
- COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
- NGK's OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
- RECOMMENDED USAGE: Racing use only, featuring special configurations and designs to ensure durability and ignitability
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
| Short Style Spark Plug | No |
|---|---|
| Part Number | R7437-8 |
| Stock Number | 4901 |
| Service Number | R7437-8 |
| Resistance (82) | 5000.0 |
| Ground Electrode Tip Design | Taper cut |
| Ground Configuration | J-gap |
| Ground Electrode Core Material | Nickel |
| Washer Included | Yes |
| Grade Type | Performance |
| Electrical Terminal Type | Non-removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Iridium |
| Pre-Gap Size (IN) | .028 |
| Pre-Gap Size (MM) | 0.7 |
| Ground Electrode Quantity | 1 |
| Hex Size | 5/8' (16mm) |
| Insulator Height (IN) | 1.99 |
| Insulator Height (MM) | 50.5 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach (IN) | 1.043 |
| Reach (MM) | 26.5 |
| Thread Diameter (IN) | 0.551 |
| Thread Diameter (MM) | 14.0 |
| Insulator Material | Ceramic |
| Resistor Type | Yes |
| Skirt Length (IN) | 0.0 |
| Skirt Length (MM) | 0.0 |
| Ground Electrode Tip Material | Nickel |
| Skirt | No |
| Center Electrode Insulator Tip Projection (IN) | 0.12 |
| Center Electrode Insulator Tip Projection (MM) | 3.0 |
| Center Electrode Design | Fine wire |
| Washer Type | Crush |
| Center Electrode Projection | Mid projection |
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund.
Warranty Policy
Right parts, guaranteed. If you find any defects, simply notify us within the warranty period, and we’ll take care of it. Check out our Warranty Policy for more details.
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