Home / 4 Pack NGK Iridium IX 6441 Spark Plugs ZFR6FIX-11
4 Pack NGK Iridium IX 6441 Spark Plugs ZFR6FIX-11
$63.77
Free shipping on all orders.
Qty In Stock: 20
The NGK 6441 Iridium IX Spark Plug (ZFR6FIX-11) is engineered for high-performance ignition, superior durability, and fuel efficiency in modern engines. With an ultra-fine iridium center electrode and tapered ground electrode, it provides quicker starts, reduced misfires, and long-lasting performance under demanding driving conditions.
Features & Benefits:
🔧 Iridium tip delivers long-lasting spark and high ignitability
🔧 Tapered ground electrode improves flame propagation and performance
🔧 Resists fouling and ensures stable combustion
🔧 Pre-gapped at 1.1mm for fast, OE-style installation
Specifications:
Brand & Part Number: NGK 6441 (ZFR6FIX-11)
Material: Iridium
Thread Size: 14mm
Reach: 19mm (0.75 in)
Hex Size: 5/8 in (16mm)
Heat Range: 6
Seat Type: Gasket
Resistor: Yes
Gap: 1.1mm (0.043 in)
Choose NGK ZFR6FIX-11 Iridium IX for long-life ignition performance, improved engine efficiency, and reliable starts—order now!
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.
