Set of 4 Genuine NGK 6619 Iridium IX Spark Plugs LFR6AIX11 for BMW Mercedes


4 in stock

Terminal Type: Solid
Electrode Material: Iridium
Thread Size: 0.551"
Thread Reach: 26.5 mm
Ground Electrode Quantity: 1
Gap: 0.044"
Center Electrode Diameter: 0.023"
Spark Plug Seat Style: Flat
Heat Range: 6
Longevity: 40-50k Miles
Shape: Taper Cut
Thread Diameter: 14 mm
Overall Height: ISO
Resistance: 5 kOhm
Insulator Height: 50.50 mm
Center Electrode Type: Fine Wire
Center Electrode Core Material: Copper Core
Ground Electrode Type: Standard
Ground Configuration: Standard
Ground Electrode Core Material: Nickel Core
Ground Electrode Tip Design: Taper Cut
Insulator Type: Projected
Nominal Gap: 1.1 mm

Designed for outstanding acceleration, high fuel efficiency, and durability
Ensure a consistently stable spark
Extremely high melting point, perfect for today’s high-tech, high-performance engines
Extremely resistant to heat, corrosion and electrical wear
Match OE fit and quality
0.6 mm laser welded iridium tip
Tapered ground electrode
Manufactured using triple-gasket sealing process to prevent leakage through the shell
Alumina silicate insulator for strength and optimal heat transfer
Cold-rolled threads for easier removal and installation
Corrugated ribs eliminate misfire causing “flashover”
Trivalent metal plating
Last 40 to 50 thousand miles

Brand: Brand: NGK
SKU SKU: 6619-4K
Mfg Part #: 6619


Pack of 4 LFR6AIX11 - Iridium IX Spark Plug (6619) by NGK. With Resistor. Designed for performance enthusiasts who want extreme ignitability, improved throttle response and superior anti-fouling, these spark plugs are a great option for modified engines and appropriate replacement for OE spark plugs, where recommended. With a 0.6 mm laser welded iridium tip and taper cut ground electrode, these plugs provide more area for flame expansion for quicker starts, improved performance, and better efficiency.

Additional information

Weight .56 lbs



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SKU: 6619-4K Category: