Home / Set 8Pcs Ngk Racing Spark Plugs Stock 4091 Nickel Core Tip Standard 0 032In R5671A 7
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Set 8Pcs Ngk Racing Spark Plugs Stock 4091 Nickel Core Tip Standard 0 032In R5671A 7
$84.77
Free shipping on all orders.
Qty In Stock: 20
The NGK 4091 V-Power Racing Spark Plug (R5671A-7) is engineered for extreme performance in racing and high-horsepower engines. With a projected tip design, solid copper core, and cold heat range, it delivers superior ignitability, detonation resistance, and consistent combustion under high RPM and extreme pressure conditions.
Features & Benefits:
🔧 V-Power design enhances ignitability and flame propagation
🔧 Cold heat range ideal for high-compression, high-RPM engines
🔧 Copper core provides excellent thermal conductivity
🔧 Non-resistor racing design for maximum spark energy
Specifications:
Brand & Part Number: NGK 4091 (R5671A-7)
Material: Nickel with Copper Core
Thread Size: 14mm
Reach: 19mm (0.75 in)
Hex Size: 5/8 in (16mm)
Heat Range: 7
Seat Type: Gasket
Resistor: No
Gap: 0.7mm (0.028 in)
Choose NGK R5671A-7 V-Power Racing Spark Plugs for peak ignition performance, durability, and reliability in your competition engine—trusted by racers worldwide!
Shipping Info
Free shipping on every US order. In-stock parts typically ship within 1 business day from Texas.
Returns
30-day returns on unused parts in original packaging. Wrong or defective items are replaced or refunded. See the return policy.
How do I confirm this part fits?
Match the brand and part number to your vehicle, or use the Parts Finder on the homepage. Contact us before ordering if you are unsure.
Are these parts new?
Yes. TXN Supply Co sells new parts from trusted OEM-quality brands — not remanufactured cores.
How fast will my order ship?
In-stock orders ship within 1 business day. Delivery time depends on your ZIP; most US addresses arrive in 2–5 business days.
What is your return policy?
Unused items can be returned within 30 days in original packaging. Customer-initiated returns may include a restocking fee and return shipping.
