NGK 6619 Iridium IX Spark Plugs LFR6AIX-11 (Pack of 6)

Genuine NGK Iridium IX Spark Plug Set – Pack of 6 (Stock No. 6619 / Part # LFR6AIX-11)

Enhance your engine’s throttle response, ignition stability, and overall power output with a factory-fresh 6-pack of genuine NGK Iridium IX spark plugs. Featuring a 0.6mm fine-wire iridium center electrode and a tapered ground electrode, the NGK LFR6AIX-11 delivers extreme ignitability, superior anti-fouling resistance, and maximum spark energy across all RPM ranges.

Engineered specifically for performance enthusiasts and daily drivers alike, this set is ideal for routine ignition maintenance or resolving engine misfires, rough idling, and poor fuel efficiency in V6 engines.

 Key Features & Benefits:

• 0.6mm Fine-Wire Iridium Tip: Requires lower voltage to spark, ensuring rapid flame propagation, crisp throttle response, and smooth idle.
• Tapered Cut Ground Electrode: Minimizes electrical quenching for improved flame expansion and better fuel combustion.
• Extreme Durability & Heat Resistance: High-melting-point iridium alloy withstands severe thermal stress and electrical erosion.
• Trivalent Metal Plating: Superior anti-corrosion and anti-seizing properties eliminate the need for anti-seize compound during installation.
• Thermo-Edge Technology: Microscopic spark gaps clear carbon deposits as they form for built-in anti-fouling protection.

 Cross-Reference & Interchange Part Numbers:

Replaces and interchanges with the following OEM and manufacturer part numbers:

• NGK Part / Stock Numbers: LFR6AIX-11, LFR6AIX11, 6619
• Toyota / Lexus OEM: 90919-01247, 90919-01259, FK20HR11, SK20HR11
• Nissan / Infiniti OEM: 22401-EW61C, 22401-5M016, PLFR6A-11
• Denso / Aftermarket: IKH20, IKH20TT, 5344, 3426, VKH20

 Product Specifications:

• Brand: NGK Spark Plugs
• Series: Iridium IX
• Stock Number: 6619
• Part Number / Shell ID: LFR6AIX-11
• Quantity Included: Pack of 6 Spark Plugs
• Center Electrode Material: Fine-Wire Iridium
• Ground Electrode Cut: Tapered Cut
• Thread Size: 14mm
• Reach: 26.5mm (1.04") — Long Reach
• Hex Size: 5/8" (16mm)
• Factory Pre-Gap: 0.044" (1.1mm)
• Heat Range: 6
• Condition: Brand New In Original Packaging

 Vehicle Compatibility:

Fits a wide range of V6 and 6-cylinder Toyota, Lexus, Nissan, Infiniti, and Subaru models requiring long-reach 14mm spark plugs. Please verify fitment using your owner's manual or VIN before ordering.

• Toyota 4Runner: 2003 – 2015 (4.0L V6 1GR-FE)
• Toyota Tacoma: 2005 – 2015 (4.0L V6 1GR-FE)
• Toyota Tundra: 2005 – 2014 (4.0L V6 1GR-FE)
• Toyota FJ Cruiser: 2007 – 2014 (4.0L V6 1GR-FE)
• Lexus RX350 / ES350: 2007 – 2015 (3.5L V6)
• Nissan Frontier / Xterra / Pathfinder: 2005 – 2019 (4.0L V6 VQ40DE)
• Infiniti G35 / FX35: 2003 – 2008 (3.5L V6 VQ35DE)

 Shipping & Delivery Guarantee:

• Fast 1-2 Day Processing: Orders process and ship within 1-2 business day directly from our warehouse.
• Protective Packaging: Individually boxed and cushioned so electrode gaps stay properly set during transit.
• Live Tracking: Real-time tracking link emailed as soon as your package is dispatched to the carrier.
• 100% Genuine OEM Guarantee: Authentic NGK products sourced directly—no counterfeit or knockoff components.

Why Shop With Valtrix Powertrain?
At Valtrix Powertrain, we supply genuine OEM and performance ignition components to keep your engine firing at full potential. Enjoy fast dispatch, protective shipping, and reliable customer support on every order.