Our 20 Recommendations:
Best Non-Fouling Spark Plugs Reviews:
SaleBestseller No. 1 
6 New NGK Iridium IX Spark Plugs LFR5AIX-11 # 4469
- Extreme performance upgrade via OEM spark plugs and provide a lifetime at 40,000 50,000 miles.
- Plugs have a fine-wire Iridium center electrode and nickel-alloy terrain electrodes for maximum engine and torque.
- Designed for fuel-injected and turbo engines.
- Precision laser electrode construction.
SaleBestseller No. 2 
Set of 8 OEM Motorcraft Platinum SP546 (SP515) HT15 Spark Plugs For Ford 5.4L
- Every single spark plug is inspected throughout the entire shipping process for worry free, out-of-the-box performance.
- Designed with high quality materials to meet or exceed OEM Specifications.
- High melting point provides excellent resistance to erosion
- Provide service intervals from 60,000 to 100,000 miles
SaleBestseller No. 3 
NGK # 6509 Iridium Spark Plug LTR6IX-11 - 6 PCSNEW
- FREE SHIPPING to anywhere IN USA and territories For This Item
- Better Performance
- Good Brand Name NGK
- Iridium
- 1order = 6 Pieces
Bestseller No. 4 
MAS Set of 8 Ignition Coils Pack Straight Boot & Motorcraft Spark plug SP546 SP515 Compatible with Ford F150 F250 F350 Super Duty Expedition Lincoln Navigator V8 5.4l Replacement for DG511 FD508
- 【Note】--Please use the year/make/model drop down bar and interchangeable part numbers to confirm compatibility.If your original coils are brown boots, you will need DG521.
- 【Advantage】--Reduces common ignition coil issues such as; no/hard start, long crank time, misfires, lack of power, inconsistent transmission shifts, spark plug fouling, premature catalytic converter failure, poor fuel economy, check engine light illumination
- 【Vehicle Fitment】--Compatible with 2005-2008 Ford Expedition,2004-2008 Ford F150,2005-2008 Ford F250 Super Duty,2005-2008 Ford F350 Super Duty,2006-2008 Lincoln Mark LT,2005-2008 Lincoln Navigator
- 【Compatible Part Numbers】--Replacement for DG511,5C1584,E508,3L3E-12A366-CA,3L3Z-12029-BA,C1659,3L3U12A366BB,50082,601000,11054,3L3U-12A366-BB,SP515,SP546
- 【Warranty】--One Year Limited Warranty
Bestseller No. 5 
6 PCSNEW -- DENSO #4503 PLATINUM T T Spark Plugs -- PK16TT
- DENSO Unique Twin-Tip Structure
- 1.1mm platinum center electrode
- 360 Laser welding
- The Titanium-enhanced alloy on the ground electrode also increases durability, which is critical to minimize tip erosion and achieve the new Twin-Tip design.
Bestseller No. 6 
Proform 67407 Spark Plug Adapter
- 14mm This long reach 14mm adapter allows you to easily work on long spark plug holes. The adapter screws into 14mm spark plug holes.
SaleBestseller No. 7 
Autolite Iridium XP Automotive Replacement Spark Plugs, XP5325 (Pack of 4)
- EXTENDED CHANGE INTERVAL: The Autolite Iridium XP automotive replacement spark plug is engineered to last for up to 100,000 miles depending on engine type making it one of the most durable spark plugs on the market today
- FUEL EFFICIENCY: These spark plugs utilize a 0.6mm finewire iridium centerwire tip design with laser welded technology for maximum fuel efficiency. Our finewire electrodes produce more focused and consistent ignitability resulting in less fuel consumption
- OPTIMAL PERFORMANCE: This replacement iridium spark plug provides better durability and a more focused ignition for better overall ignitabilty and optimal performance
- AUTOLITE ADVANTAGE: Autolite has been producing spark plugs since 1936 making it one of the most trusted and reliable brands for your OE replacement spark plug needs
- CONSTRUCTION: Every iridium spark plug comes with a platinum protected ground wire for maximum efficiency in all ignition types including DIS systems and a V-trimmed ground electrode for improved ignitability
Bestseller No. 8 
NGK 3951 Pack of 8 Spark Plugs (TR55)
- Includes (8) Spark Plug.
- Genuine NGK Replacement Part.
- New, Bulk Packed.
- Consult owners manual for proper part number identification and proper installation.
- Please refer to list for compatibility.
SaleBestseller No. 9 
Autolite Iridium XP Automotive Replacement Spark Plugs, XP5702 (4 Pack)
- EXTENDED CHANGE INTERVAL: The Autolite Iridium XP automotive replacement spark plug is engineered to last for up to 100,000 miles depending on engine type making it one of the most durable spark plugs on the market today
- FUEL EFFICIENCY: These spark plugs utilize a 0.6mm finewire iridium centerwire tip design with laser welded technology for maximum fuel efficiency. Our finewire electrodes produce more focused and consistent ignitability resulting in less fuel consumption
- OPTIMAL PERFORMANCE: This replacement iridium spark plug provides better durability and a more focused ignition for better overall ignitabilty and optimal performance
- AUTOLITE ADVANTAGE: Autolite has been producing spark plugs since 1936 making it one of the most trusted and reliable brands for your OE replacement spark plug needs
- CONSTRUCTION: Every iridium spark plug comes with a platinum protected ground wire for maximum efficiency in all ignition types including DIS systems and a V-trimmed ground electrode for improved ignitability
SaleBestseller No. 10 
NGK 7090 BKR5EGP G-Power Spark Plug, Pack of 4
- NGK 7090 Spark Plug - Pack of 4 (7090)
Bestseller No. 11 
ACDelco 41-962 Professional Platinum Spark Plug, (8)
- One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal that helps reduce radio frequency and engine interference, regulate spark plug energy, and protect against compression pressures for long life
- Double platinum point pad on center and ground electrode offer excellent durability and consistent voltage demands to help reduce wear on ignition system
- Pure copper core results in cooler electrode temperature for maximized durability and fouling resistance
- Some ACDelco GM Original Equipment parts may have formerly appeared as ACDelco Professional
Bestseller No. 12 
NGK LKAR6AIX-11 Iridium IX Spark Plug (91187 Iridium Ix), 4 Pack
- 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
Bestseller No. 13 
Bolaxin CAL389-100 14mm Spark Plug Port Insert Compatible with Ford Triton 4. 6L/ 5. 4L/ 6.8 V-10 Two Valve Engines 1996-2003 (4pcs)
- Compatible with Ford Triton use on 4.6L/ 5.4L / 6.8 V-10 Two Valve Engines. For use on years 1996/ 1997/ 1998/ 1999/ 2000/ 2001/ 2002/ 2003.
- Part Number: 389-100 Replacement Inserts.
- Inside Diameter: m14 x 1.25; Outside Diameter: 75 -16.
- High quality oversized steel alloy insert will repair other inserts that fail and has no ill effects from heat transfer.
- Package: 4*Spark Plug Port Insert./ If you have any questions, contact to us freely and we will reply within 12 hours, thank you.
Bestseller No. 14 
6 PCSNEW -- DENSO #4504 PLATINUM T T Spark Plugs -- PK20TT
- DENSOs revolutionary Twin-Tip design is a combination of highly durable precious metals-Platinum and Titanium.
- The center electrode is created using an extremely durable platinum alloy that allows for the reduction of the tip size to 1.1mm in diameter, while maintaining the life of the plug.
- The Titanium-enhanced alloy on the ground electrode also increases durability, which is critical to minimize tip erosion and achieve the new Twin-Tip design
- Superior ignitability of the DENSO Platinum TT means more efficient combustion, which yields better engine performance in terms of power and fuel economy.
Bestseller No. 15 
NGK Spark Plug SILZKBR8D8S 97506 Pack of 6
- Authentic Product
- NGK Spark Plugs Brand
- Individual Pack
- NGK Spark Plugs Part #97506
- Brand new, never used.
SaleBestseller No. 16 
Spark Plugs and Coil Packs of 6 - UF349 - Compatible with 2002-2012, Nissan Altima, Infiniti, Maxima, Murano, Quest, Pathfinder, 350z, Q4 G35, FX35
- COMBO PACK - This Pack Contains 6xIgnition Coils AND 6xDouble Iridium Spark Plugs
- Compatible with these Infiniti, Nissan Maxima, Nissan Altima, Nissan Murano, Nissan Pathfinder, Xterra, Equator,
- REDUCES COMMON ISSUES - No hard start, long crank time, power, transmission, shift problems or poor fuel economy issues
- PERFECT FIT. HIGH QUALITY - Designed to replace original parts with super easy, safe and seamless installation
- YEAR WARRANTY - If you're not satisfied with your purchase we'll refund or replace the product, no questions asked
SaleBestseller No. 17 
(6-Pack) NGK Spark Plugs TR55 (Stock # 3951)
- Designed to operate over a much wider heat range than ordinary plugs
- Resists carbon buildup and pre-ignition
- Patented triple gasket sealing process eliminates the possibility of combustion gas leakage
- NGK spark plugs are an OE cornerstone that have provided decades of reliable performance
SaleBestseller No. 18 
NGK 5464 BKR5EIX-11 Iridium IX Spark Plug, Pack of 4
- 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; Part number of spark plug inside the box: BKR5EIX-11
SaleBestseller No. 19 
NGK # 3186 G-Power Platinum Spark Plugs TR5GP - 8 PCSNEW
- G-Power Platinum
- Designed to operate over a much wider heat range than ordinary plugs
- Resists carbon buildup and pre-ignition
- Patented triple gasket sealing process eliminates the possibility of combustion gas leakage
Bestseller No. 20 
PAPAPARTS Set of 6 Ignition Coil Pack UF646 and Iridium Platinum Spark Plug Compatible with Ford Expedition Explorer F150 Flex Police Taurus Transit Lincoln MKS MKT Navigator 3.5L V6
- 【Ignition Coil】SUS304 stainless steel spring material, silicone rubber resistant to high temperature 200℃, epoxy resin seal, and corrosion resistant connection ensure good electrical connection that effectively provide proper voltage to the spark plug electrode, precisely control the conduction time, and realize high and low speed ignition frequency conversion.
- 【Iridium Platinum Spark Plug】The electrode material is composed of iridium and platinum, which improves the tip structure of the firing section and makes the ignition voltage stable and the engine work smoothly.
- 【Easy to Install】The original location of the direct replacement installation, non-wiring does not leak, excellent heat dissipation, dedicated to the car.
- 【Compatible Part Numbers】UF646, DG549, IC749, 2505-484814, BL3Z-12029-C, E1146, 673-6300, 5C1871, 96621. Pls carefully check your vehicle year & make & model with the fitment of Amazon. You must read our description carefully, and it will tell you more about the fitment. Pls check your parts No. It must be among our fitment OEM No.
- 【Service】We provide 7*24h customer service for any RETURN and EXCHANGE. If you have any questions in use, just contact us via email and we will assist you further.
Last update on 2023-05-28 / Affiliate links / Images from Amazon Product Advertising API