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High-Performance Car Spark Plugs

Top brands like NGK, DENSO, Autolite, and Champion help maximize your engine’s power and performance. We carry thousands of automotive spark plugs for everything from a Chevy to a Ford or a Volkswagen to a Toyota, all backed by our 100% fitment guarantee. Browse popular series, including NGK Iridium, NGK Racing, and NGK G-Power, to find the perfect replacement spark plugs for your vehicle.

NGK spark plugs and DENSO spark plugs, plus those from Autolite, Bosch, and Champion, help maximize engine power and operating performance ride after ride. We carry thousands of spark plugs for everything from Chevy to Ford, Volkswagen to Toyota, all with a 100% fitment guarantee. Browse popular spark plugs including NGK Iridium, NGK Racing, NGK G-Power, and many more replacement spark plugs. Ensure they’re well protected in the Cylinder Head and properly connected via the Coil Boots when replacing them.

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  1. NGK Spark Plug
    8 pc NGK Standard 93961 LKAR7C-9 Spark Plugs
    Rating:
    100%
    8  Reviews
    Special Price $57.38 Regular Price $81.99
    NGK / NTK
  2. NGK Iridium IX
    16 pc NGK Iridium IX Spark Plugs for 2011-2021 Ram 1500 5.7L V8
    Rating:
    98%
    34  Reviews
    Special Price $138.26 Regular Price $197.99
    NGK / NTK
  3. Autolite Spark Plug
    Autolite Racing AR3910X Spark Plug
    Special Price $5.96 Regular Price $8.99
    Autolite
    Out of stock
  4. NGK Spark Plug
    NGK Laser Iridium 92145 LZFR5CI-11 Spark Plug
    Rating:
    100%
    1  Review
    Special Price $8.88 Regular Price $12.99
    NGK / NTK
  5. NGK Laser Iridium
    6 pc NGK Laser Iridium 4462 IZFR6J Spark Plugs
    Rating:
    76%
    10  Reviews
    Special Price $74.84 Regular Price $106.99
    NGK / NTK
  6. NGK Spark Plug
    6 pc NGK Ruthenium HX 95605 LTR7BHX Spark Plugs
    Special Price $63.48 Regular Price $90.99
    NGK / NTK
  7. NGK Iridium IX
    8 pc NGK Iridium IX 6510 LTR7IX-11 Spark Plugs
    Rating:
    73%
    3  Reviews
    Special Price $60.19 Regular Price $85.99
    NGK / NTK
  8. NGK Spark Plug
    4 pc NGK Laser Iridium 95112 ILZKAR8H8S Spark Plugs
    Rating:
    100%
    3  Reviews
    Special Price $49.70 Regular Price $70.99
    NGK / NTK
  9. NGK Spark Plug
    NGK Laser Iridium 97506 SILZKBR8D8S Spark Plug
    Special Price $17.29 Regular Price $24.99
    NGK / NTK
  10. Autolite Spark Plug
    4 pc Autolite Racing AR3910X Spark Plugs
    Special Price $20.74 Regular Price $29.99
    Autolite
    Out of stock
  11. NGK Iridium IX
    4 pc NGK Iridium IX 3521 CR9EIX Spark Plugs
    Rating:
    93%
    3  Reviews
    Special Price $29.92 Regular Price $42.99
    NGK / NTK
  12. NGK Laser Iridium
    6 pc NGK Laser Iridium 5887 IZFR5G Spark Plugs
    Rating:
    90%
    8  Reviews
    Special Price $74.84 Regular Price $106.99
    NGK / NTK
  13. NGK Spark Plug
    NGK Standard 93961 LKAR7C-9 Spark Plug
    Rating:
    100%
    1  Review
    Special Price $7.93 Regular Price $10.99
    NGK / NTK
  14. DENSO Spark Plug
    6 pc DENSO Iridium Long Life 3491 FK20HBR8 Spark Plugs
    Rating:
    87%
    3  Reviews
    Special Price $102.91 Regular Price $146.99
    DENSO
  15. NGK Spark Plugs
    6 pc NGK Laser Iridium Spark Plugs for 2008-2013 Infiniti G37 3.7L V6
    Special Price $112.16 Regular Price $159.99
    NGK / NTK
  16. NGK Spark Plug
    8 pc NGK V-Power Racing 7317 R5724-8 Spark Plugs
    Rating:
    100%
    2  Reviews
    Special Price $22.87 Regular Price $32.99
    NGK / NTK
  17. Champion Spark Plug
    6 pc Champion Iridium 9005 QC10WEP Spark Plugs
    Rating:
    100%
    4  Reviews
    Special Price $55.81 Regular Price $79.99
    Champion
  18. NGK Standard
    10 pc NGK Standard 3365 CMR6H Spark Plugs
    Special Price $39.79 Regular Price $56.99
    NGK / NTK
  19. NGK Iridium IX
    8 pc NGK Iridium IX 6509 LTR6IX-11 Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $60.19 Regular Price $85.99
    NGK / NTK
  20. NGK Spark Plug
    6 pc NGK Laser Iridium 95350 DILZKR7B11G Spark Plugs
    Rating:
    100%
    2  Reviews
    Special Price $91.71 Regular Price $130.99
    NGK / NTK
  21. NGK Spark Plug
    6 pc NGK Laser Iridium Spark Plugs for 2016-2020 Infiniti Q50 3.0L V6
    Rating:
    100%
    1  Review
    Special Price $113.17 Regular Price $161.99
    NGK / NTK
  22. NGK Spark Plug
    6 pc NGK Standard 93961 LKAR7C-9 Spark Plugs
    Rating:
    100%
    2  Reviews
    Special Price $43.25 Regular Price $61.99
    NGK / NTK
  23. NGK Laser Iridium
    6 pc NGK Laser Iridium 7751 ILZKR7B11 Spark Plugs
    Rating:
    90%
    2  Reviews
    Special Price $74.04 Regular Price $105.99
    NGK / NTK
  24. NGK Spark Plug
    4 pc NGK Laser Iridium 92217 DILKAR7B8 Spark Plugs
    Rating:
    100%
    2  Reviews
    Special Price $61.27 Regular Price $87.99
    NGK / NTK
  25. Champion Spark Plug
    10 pc Champion Copper Plus 71 RC12YC Spark Plugs
    Special Price $21.56 Regular Price $30.99
    Champion
  26. NGK Iridium IX
    16 pc NGK Iridium IX Spark Plugs for 2009-2020 Dodge Charger 5.7L V8
    Rating:
    100%
    2  Reviews
    Special Price $141.09 Regular Price $201.99
    NGK / NTK
  27. NGK Spark Plug
    4 pc NGK Laser Iridium 90288 DILKAR7M8 Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $66.22 Regular Price $94.99
    NGK / NTK
  28. DENSO Spark Plug
    DENSO Iridium Long Life 3491 FK20HBR8 Spark Plug
    Special Price $17.88 Regular Price $25.99
    DENSO
  29. NGK Standard
    10 pc NGK Standard 7131 BPR6ES Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $25.91 Regular Price $36.99
    NGK / NTK
  30. NGK Laser Iridium
    NGK Laser Iridium 4212 ILFR6G-E Spark Plug
    Rating:
    90%
    2  Reviews
    Special Price $12.52 Regular Price $17.99
    NGK / NTK
  31. NGK Standard
    10 pc NGK Standard 6703 BPMR7A SOLID Spark Plugs
    Special Price $24.73 Regular Price $34.99
    NGK / NTK
  32. NGK Iridium IX
    8 pc NGK Iridium IX 4469 LFR5AIX-11 Spark Plugs
    Special Price $58.98 Regular Price $83.99
    NGK / NTK
  33. NGK Spark Plug
    6 pc NGK Laser Iridium 94201 SILZKGR8B8S Spark Plugs
    Special Price $97.31 Regular Price $138.99
    NGK / NTK
  34. NGK Spark Plug
    8 pc NGK V-Power Racing 4091 R5671A-7 Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $46.37 Regular Price $65.99
    NGK / NTK
  35. NGK Spark Plug
    8 pc NGK V-Power Racing 4554 R5671A-8 Spark Plugs
    Rating:
    87%
    3  Reviews
    Special Price $46.37 Regular Price $65.99
    NGK / NTK
  36. NGK Laser Iridium
    NGK Laser Iridium 5899 IZFR5J Spark Plug
    Special Price $13.58 Regular Price $18.99
    NGK / NTK
  37. NGK Spark Plug
    8 pc NGK V-Power Racing 5238 R5671A-9 Spark Plugs
    Rating:
    90%
    2  Reviews
    Special Price $46.37 Regular Price $65.99
    NGK / NTK
  38. NGK Standard
    10 pc NGK Standard 6578 BPR4ES SOLID Spark Plugs
    Special Price $25.26 Regular Price $35.99
    NGK / NTK
  39. NGK Laser Iridium
    4 pc NGK Laser Iridium 6289 CR9EIA-9 Spark Plugs
    Special Price $33.82 Regular Price $47.99
    NGK / NTK
  40. NGK Laser Iridium
    4 pc NGK Laser Iridium 93026 DILKAR8A8 Spark Plugs
    Rating:
    100%
    2  Reviews
    Special Price $62.25 Regular Price $88.99
    NGK / NTK
  41. NGK Spark Plug
    8 pc NGK Standard 4008 BPR6ES SOLID Spark Plugs
    Rating:
    100%
    2  Reviews
    Special Price $20.80 Regular Price $29.99
    NGK / NTK
  42. NGK Laser Iridium
    6 pc NGK Laser Iridium 9723 SILZKR7B11 Spark Plugs
    Rating:
    100%
    2  Reviews
    Special Price $68.78 Regular Price $97.99
    NGK / NTK
  43. NGK Spark Plug
    6 pc NGK Laser Iridium 96008 DILKAR8K8G Spark Plugs
    Special Price $97.31 Regular Price $138.99
    NGK / NTK
  44. NGK Spark Plug
    4 pc NGK Laser Iridium 95660 ILZKAR8J8SY Spark Plugs
    Special Price $46.50 Regular Price $65.99
    NGK / NTK
  45. NGK V-Power
    8 pc NGK V-Power 4177 TR6 Spark Plugs
    Rating:
    100%
    3  Reviews
    Special Price $20.59 Regular Price $28.99
    NGK / NTK
  46. NGK Standard
    6 pc NGK Standard 3133 BPZ8HS-10 Spark Plugs
    Rating:
    100%
    3  Reviews
    Special Price $50.75 Regular Price $71.99
    NGK / NTK
  47. Champion Spark Plug
    6 pc Champion Iridium 9809 QC8WEP Spark Plugs
    Rating:
    100%
    2  Reviews
    Special Price $54.99 Regular Price $78.99
    Champion
  48. NGK Standard
    10 pc NGK Standard 7788 BPR9ES Spark Plugs
    Special Price $26.99 Regular Price $38.99
    NGK / NTK
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The Sixity Auto Advantage

Finding the right car spark plugs can seem complicated, but our goal is to make it simple. We combine a massive selection of parts from trusted brands with the expert, US-based support you need to make the right choice. With fast shipping and a 100% fitment guarantee, we provide a hassle-free shopping experience that has earned the trust of over a million customers.

Platinum, Iridium, and More

Choosing the right material is key to your engine’s performance and longevity. We carry a massive selection of aftermarket spark plugs in every type, from long-lasting iridium to dependable copper plugs for classic vehicles. Whatever your engine needs, we have the right plug to match its specific requirements, ensuring optimal spark and efficiency.

Expert Support When You Need It

Not sure which plug is right for your vehicle? Our friendly, US-based customer support team is here to help. With deep knowledge of our full catalog, they can guide you to the perfect car spark plugs for your specific make and model. We are committed to helping you buy with confidence and getting your installation done right the first time.

Frequently Asked Questions

Got a question about our automotive spark plugs? Here are a few things people often ask. For anything else, our main FAQ page has you covered.

How do I find the right spark plugs for my car?

Your best bet is our vehicle selector tool. Just plug in your car’s info, and we’ll show you exactly which plugs are guaranteed to work.

Are your aftermarket spark plugs as good as the originals?

Definitely. We only carry parts that are as good or better than the ones that came in your car, but without those dealership prices.

How often should I replace car spark plugs?

That really depends on the type. A standard copper plug is usually good for about 20,000 miles, while a high-end iridium one can last 100,000. Your owner’s manual will have the exact schedule for your engine.

Spark Plug Features

  • Precision ceramic insulators
  • Corrosion-resistant shell with triple high pressure gas seals
  • Screw or snap-on electrical connectors
  • Pre-installed metal compression gaskets
  • Copper-core electrode cooling
  • Application specific heat-range design
  • Improved cold-starting performance
  • Smooth firing at high or low engine RPM
  • Reduced electrode erosion and long service life
  • Enhanced ignition efficiency and fuel economy
  • Superior anti-fouling characteristics
  • Reduced hot-spark firing voltage requirements
  • Maximum engine horsepower and torque
  • Superior throttle-response, acceleration and WOT performance
  • Precision Laser-welded Iridium electrodes - 6X harder than platinum
  • Precision ceramic insulators
  • Corrosion-resistant shell with triple high pressure gas seals
  • Screw or snap-on electrical connectors
  • Pre-installed metal compression gaskets
  • Copper-core electrode cooling
  • Application specific heat-range design
  • Improved cold-starting performance
  • Smooth firing at high or low engine RPM
  • Reduced electrode erosion and long service life
  • Enhanced ignition efficiency and fuel economy
  • Superior anti-fouling characteristics
  • Reduced hot-spark firing voltage requirements
  • Maximum engine horsepower and torque
  • Superior throttle-response, acceleration and WOT performance
  • Precision Laser-welded Iridium electrodes - 6X harder than platinum
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100% fitment guarantee at sixityauto.com

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Your parts will fit as advertised

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© 2026 Sixity, Inc. Part of Proximity Group, an American-owned and operated online retailer. All Rights Reserved.