The NGK Iridium IX LFR6AIX-11 (6619) Spark Plug is a high-performance plug designed for today’s advanced engines. Built with a 0.6mm laser-welded fine Iridium tip, this spark plug ensures high durability and a consistently stable spark for optimized engine performance.

Key Features

  • Iridium tip for durability
  • Trivalent metal plating
  • Superior anti-corrosion and anti-seizing properties

Features and Specs for Each Model

  • 0.6mm laser-welded fine Iridium tip
  • Thread size: 14mm
  • Thread Pitch: 1.25mm
  • Hex size: 5/8″ (16mm)

Pros

  • Long-lasting
  • Efficient fuel consumption
  • Reduced misfires

Cons

  • Higher cost than other types

Amazon Customer Review

★★★★★ “I noticed a significant improvement in fuel efficiency and throttle response after switching to these plugs. Highly recommended!” – John D.

Conclusion

The NGK Iridium IX LFR6AIX-11 (6619) Spark Plug offers exceptional longevity and efficient performance. Though it is on the higher end in terms of cost, the benefits it provides justify the investment.

Wings NGK Spark Plug CR7HSA XR80 XR100 XR CRF80 CR...
4.8 out of 5 stars(307)
Available for Amazon Prime 54% Off $18.62 $8.53 (as of September 17, 2024 04:16 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
2 pack NGK Standard 4549 Spark Plug Genuine NGK Pa... read more
NGK (4929) DPR8EA-9 Spark Plug - Pack of 4
4.7 out of 5 stars(1548)
Available for Amazon Prime $12.49 (as of September 17, 2024 04:16 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Includes (4) DPR8EA-9 Spark Plugs. New, Bulk Packe... read more
Autolite Iridium XP Automotive Replacement Spark P...
4.5 out of 5 stars(1040)
Available for Amazon Prime 32% Off $35.16 $23.58 (as of September 17, 2024 04:16 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
EXTENDED CHANGE INTERVAL: The Autolite Iridium XP ... read more
NGK 4339 DCPR8E SeaDoo 4-Tec Spark Plug Set for Bo...
4.8 out of 5 stars(1252)
Available for Amazon Prime 4% Off $14.54 $13.83 (as of September 17, 2024 01:19 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
3 Pack Genuine NGK 4339 DCPR8E Fits All Sea-Doo 4-... read more