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Description:
The NGK V-Power 4838 Spark Plug features NGK’s V-cut center electrode design, which directs the spark to the edge of the electrode to help the spark develop more rapidly. This can increase ignitability and reduce quenching for consistent combustion. Built with OE-style construction, it includes trivalent metal plating for anti-corrosion and anti-seizing properties, corrugated ribs to help prevent flashover, and a pure alumina silicate ceramic insulator for strength and heat transfer. A copper core aids heat removal, and triple seals help prevent leakage.
This plug uses a gasket seat, 14mm thread diameter with 1.25mm pitch, and a 12.7mm (1/2") reach. It has a 13/16" (21mm) hex, a 0.039" (1.0mm) gap, and a projected tip. It is specified as resistor: No with a resistor value: 1K ohm, and includes a strengthened ground electrode. Rated at heat range 8 with a 60-day warranty and 30k miles longevity.
Features:
V-cut nickel center electrode helps improve ignitability and reduce quenching
Trivalent metal plating for anti-corrosion and anti-seizing properties
Corrugated ribs help prevent flashover
Pure alumina silicate ceramic insulator for strength and better heat transfer
Copper core aids in heat removal
Triple seals help prevent leakage
Strengthened ground electrode
Resistor: No
Resistor value: 1K ohm
Heat range: 8
Warranty: 60 days
Longevity: 30k miles
Specifications:
Thread diameter: 14 mm
Thread pitch: 1.25 mm
Seat type: Gasket
Reach: 12.7 mm (1/2")
Hex size: 13/16" (21 mm)
Terminal type: Solid
Overall height: JIS
Gap: 0.039" (1.0 mm)
Center electrode: Nickel V-cut, 2.5 mm (projected)
Ground electrode: Nickel, standard (qty 1)
Torque specs: Cast iron 18–25.3 lb-ft; aluminum 18–21.6 lb-ft
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
