NGK RACING PLUG R6254K-105 4076
4.1 Trustpilot 99.9% positive on eBay
UK delivery £4.99, free over £60 2–4 business days
Spread the cost with 
18+, T&Cs apply
NGK RACING PLUG R6254K-105 4076. NGK's wide heat range achieved using copper wire instead of conventional iron cores for superior heat dissipation. Copper core dissipates heat quickly, cooling the electrode and insulator tip. Raised pre-ignition rating with high-conduction copper and long-nose insulator for enhanced performance. Designed specifically for high-performance engines, ensuring reliable ignition under extreme conditions. Sold individually. Part Number: 37-R6254K-105. NGK Reference Number: 4076. Heat Range: 6. Thread Size: 14 mm. Type: Resistor. Thread Reach: 19 mm (3/4"). Hex Spanner Size: 13/16" (20.6 mm). Electrode Material: Nickel Alloy Fine Wire. Seal Type: Gasket Seat. Weight: 0.12 lbs. This NGK racing spark plug is engineered for demanding, high-performance applications, making it an excellent choice for engines that require superior spark strength and efficient combustion. Its robust construction ensures reliable performance under extreme conditions.
- SKU
- 37-R6254K-105
- Brand
- NGK
- Availability
- In Stock (7)
- General Product Group
- Ignition & Electrical Parts
- General Product Type
- Spark Plug
- Variant Id
- 235648
FULL DESCRIPTION
NGK Racing Spark Plug R6254K-105
NGK Racing Spark Plug for High-Performance Engines
This NGK racing spark plug is engineered for demanding, high-performance applications, making it an excellent choice for engines that require superior spark strength and efficient combustion. Its robust construction ensures reliable performance under extreme conditions.
Key Features:
- NGK's wide heat range is achieved using a copper wire core for superior heat dissipation, cooling the electrode and insulator tip.
- Features a raised pre-ignition rating with high-conduction copper and a long-nose insulator for enhanced performance.
- Designed for high-performance engines, ensuring reliable ignition under extreme conditions.
- Sold individually.
Specifications:
- NGK Reference Number: 4076
- Heat Range: 6
- Thread Size: 14 mm
- Type: Resistor
- Hex Spanner Size: 13/16 inch (20.6 mm)
- Electrode Material: Nickel Alloy Fine Wire
- Seal Type: Gasket Seat
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Call or email us with your make, model and year and we will check it for you before you order.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.