10 Best Iridium Spark Plugs 2021

Gareth Otwell Reviewed by Gareth Otwell | Last Updated:

NGK # 1465 Laser Iridium Spark Plug IZTR5B11 – ⭐ Best Overall Iridium Spark Plug

IZTR5B11 by NGK

NGK # 1465 Laser Iridium Spark Plug IZTR5B11
  • Laser Iridium Premium
  • 1order = 8 Pieces

NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Iridium Ix)

93501 by NGK

  • Release date: 07/17/2018
  • Weight: 0.01 pounds
NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Iridium Ix)
  • Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling
  • The 0.6 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect
  • Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage
  • Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines
  • Trivalent Metal Plating provides superior anti-corrosion and anti-seizing properties

ACDelco – 💲 Best Budget Iridium Spark Plug

41-110 by ACDelco

  • Release date: 09/26/2017
  • Weight: 0.4 pounds
  • Dimensions: 4.4 x 3.5 x 1 inches
  • Warranty: 100,000 Miles / Unlimited Months (Parts Only)
ACDelco
  • Iridium offers better engine idle stability and smoother performance
  • Iridium allows for smaller, more efficient electrode designs for improved cold starting and quicker acceleration
  • Iridium fine-wire electrode helps improve ignition of the fuel and burns away carbon deposits on the tip of the plug as they form, to help improve fuel economy
  • One piece suppressor seal blocks radio frequencies that can affect vehicle electronics
  • Suppressor seal meters spark energy for longer electrode life and seals against combustion leakage

4 PCS NEW

IKH16 by Denso

  • Weight: 0.48 pounds
  • Dimensions: 3.6 x 3.8 x 1 inches
4 PCS NEW
  • DENSO 5343
  • 1order = 4 Pieces

NGK (5464-4PK Iridium IX Spark Plug

5464-4PK by NGK

  • Weight: 0.1 pounds
  • Dimensions: 3.4 x 0.8 x 0.7 inches
  • Warranty: Limited Warranty
NGK (5464-4PK Iridium IX Spark Plug
  • Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling
  • The 0.6 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect
  • Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage
  • Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines
  • Trivalent Metal Plating provides superior anti-corrosion and anti-seizing properties; Part number of spark plug inside the box: BKR5EIX-11

NGK (7397-4PK) TR5IX Iridium IX Spark Plug

7397-4PK by NGK

  • Release date: 06/19/2014
  • Weight: 0.15 pounds
  • Dimensions: 4.1 x 3.5 x 1 inches
NGK (7397-4PK) TR5IX Iridium IX Spark Plug
  • Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling
  • The 0.6mm laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical Quenching Effect
  • Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage
  • Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high-performance engines
  • Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties

NGK 6619 Iridium Spark Plugs LFR6AIX-11

6619 by NGK

  • Weight: 0.72 pounds
  • Dimensions: 3.7 x 0.9 x 5 inches
NGK 6619 Iridium Spark Plugs LFR6AIX-11
  • Iridium Spark Plugs
  • 1order = 6 Piece

NGK Iridium IX Spark Plugs TR55IX # 7164 – 👑 Premium Pick

7164 by NGK

  • Weight: 0.8 pounds
  • Dimensions: 4.2 x 3.6 x 1.1 inches
NGK Iridium IX Spark Plugs TR55IX # 7164
  • Sold in packs of 8

Bosch 9603 Double Iridium OE Replacement Spark Plug

9603 by Bosch Automotive

  • Color: Double Iridium
  • Weight: 0.43 pounds
Bosch 9603 Double Iridium OE Replacement Spark Plug
  • Double Iridium firing pin and ground electrode inlay provide 4X longer service life compared to standard copper plugs
  • 0.6mm fine wire firing pin provides superior ignitability and performance
  • 360 Degree continuous laser weld fuses corrosion resistant iridium firing pin to base for increased durability
  • 7 year performance satisfaction
  • Original equipment, pre-gapped replacement delivering optimum fit, form and function. Hex Size-16. Reach-19
  • Acura: 92-01 Integra, 91-92 Legend, 06 Chrysler Crossfire, 02-05 Ford Thunderbird, 00 Honda Civic; Infiniti: 99-02 G, 96-01 I30, 93-97 J30, 90-92 M30, 90-01 Q45; Jaguar: 00-01 Vanden Plas, 98-01 XJR, 01 XJ8, 00-03 XKR; Lexus: 90-91 ES250, 92-03 ES300
  • Lexus: 04-06 ES330, 98-00 GS400, 01-07 GS430, 03-09 GX470, 10-12 HS250h, 90-00 LS400, 01-06 LS430, 98-07 LX470, 99-03 RX300, 04-06 RX330, 06-08 RX400h, 92-94 SC300, 92-00 SC400, 02-10 SC430, Mercedes-Benz: 03-06 CLK55 AMG, 02 C230, 02-04 C32 AMG
  • Mercedes-Benz: 05-06 C55 AMG, 00-04 SLK230, 02-04 SLK32 AMG, 05-11 SLK55 AMG; Mitsubishi: 00 Eclipse, 04-08,10-11 Endeavor, 99-00,04-07,09 Galant; Nissan: 00-01 Altima, 90-94 D21, 99-04 Frontier, Nissan: 92-01 Maxima, 91-93 NX, 90-95,99-00 Pathfinder
  • 95 Pickup, 99-02 Quest, 91-94,98-01 Sentra, 00-04 Xterra, 95-98 0SX, 95-98 240SX, 90-96 300ZX, 03-06,09-10 Pontiac Vibe, Scion: 05-10 tC, 08-12 xB, 10-12 Subaru Legacy,10-12 Subaru Outback; Toyota: 95-04 Avalon, 88-11,17 Camry, 01-10,14-17 Highlander
  • 92-05 Celica, 92,05-06,09-12,14 Corolla, 98-07 Land Cruiser, 03-06,09-12 Matrix, 88-89,92-95 MR2, 95-97 Previa,16-17 Prius, 17 Prius C, 17 Prius Prime, 96-08,17 RAV4, 01-09 Sequoia, 98-06 Sienna, 99-08 Solara, 93-98 Supra, 00-09 Tundra, 03-09 4Runner

Denso # 5304 IRIDIUM Power Spark Plugs

IK20 by Denso

  • Weight: 0 pounds
Denso # 5304 IRIDIUM Power Spark Plugs
  • FREE SHIPPING to anywhere IN USA and territories For This Item
  • IRIDIUM POWER
  • DENSO 5304
  • 1order = 6 Pieces

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