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DENSO Iridium TT 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. DENSO Spark Plug
    6 pc DENSO Iridium TT 4704 IKH20TT Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $55.40 Regular Price $78.99
    DENSO
  2. DENSO Spark Plug
    6 pc DENSO Iridium TT 4705 IKBH20TT Spark Plugs
    Special Price $72.28 Regular Price $102.99
    DENSO
  3. DENSO Spark Plug
    6 pc DENSO Iridium TT 4701 IK16TT Spark Plugs
    Special Price $49.49 Regular Price $70.99
    DENSO
  4. DENSO Spark Plug
    2 pc DENSO Iridium TT 4715 ITF16TT Spark Plugs
    Special Price $17.56 Regular Price $24.99
    DENSO
  5. DENSO Spark Plug
    4 pc DENSO Iridium TT 4702 IK20TT Spark Plugs
    Special Price $33.97 Regular Price $48.99
    DENSO
  6. DENSO Spark Plug
    4 pc DENSO Iridium TT Spark Plugs for 1993-2008 Toyota Corolla 1.6L 1.8L L4
    Rating:
    100%
    1  Review
    Special Price $43.54 Regular Price $61.99
    DENSO
  7. DENSO Spark Plug
    6 pc DENSO Iridium TT 4703 IKH16TT Spark Plugs
    Special Price $54.29 Regular Price $77.99
    DENSO
  8. DENSO Spark Plug
    4 pc DENSO Iridium TT 4704 IKH20TT Spark Plugs
    Special Price $37.23 Regular Price $52.99
    DENSO
  9. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2007-2013 Toyota FJ Cruiser 4.0L V6
    Special Price $66.81 Regular Price $94.99
    DENSO
  10. DENSO Spark Plug
    8 pc DENSO Iridium TT Spark Plugs for 2000-2009 Toyota Tundra 4.7L V8
    Special Price $79.70 Regular Price $113.99
    DENSO
  11. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2017 Toyota Highlander
    Special Price $88.02 Regular Price $125.99
    DENSO
  12. DENSO Spark Plug
    2 pc DENSO Iridium TT 4702 IK20TT Spark Plugs
    Special Price $17.43 Regular Price $24.99
    DENSO
  13. DENSO Spark Plug
    4 pc DENSO Iridium TT Spark Plugs for 1998-2011 Honda Civic 1.6L 1.7L 1.8L 2.0L L4
    Special Price $44.43 Regular Price $62.99
    DENSO
  14. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2006-2008 Honda Ridgeline 3.5L V6
    Special Price $61.62 Regular Price $87.99
    DENSO
  15. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 1995-2004 Toyota Tacoma 3.4L V6
    Special Price $62.88 Regular Price $89.99
    DENSO
  16. DENSO Spark Plug
    8 pc DENSO Iridium TT 4702 IK20TT Spark Plugs
    Special Price $67.04 Regular Price $95.99
    DENSO
  17. DENSO Spark Plug
    8 pc DENSO Iridium TT 4703 IKH16TT Spark Plugs
    Special Price $73.57 Regular Price $104.99
    DENSO
  18. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2005-2015 Toyota Tacoma 4.0L V6
    Rating:
    100%
    1  Review
    Special Price $66.81 Regular Price $94.99
    DENSO
  19. DENSO Spark Plug
    4 pc DENSO Iridium TT Spark Plugs for 2013-2016 Ford Fusion 2.0L 2.5L L4
    Special Price $50.07 Regular Price $71.99
    DENSO
  20. DENSO Spark Plug
    6 pc DENSO Iridium TT 4713 IT16TT Spark Plugs
    Special Price $51.97 Regular Price $73.99
    DENSO
  21. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2007-2016 Lexus ES350 3.5L V6
    Special Price $66.81 Regular Price $94.99
    DENSO
  22. DENSO Spark Plug
    8 pc DENSO Iridium TT 4704 IKH20TT Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $72.09 Regular Price $102.99
    DENSO
  23. DENSO Spark Plug
    4 pc DENSO Iridium TT Spark Plugs for 1990-2010 Toyota Corolla 1.6L 1.8L 2.4L L4
    Special Price $44.43 Regular Price $62.99
    DENSO
  24. DENSO Spark Plug
    4 pc DENSO Iridium TT Spark Plugs for 1992-2011 Toyota Camry 2.2L 2.4L L4
    Rating:
    100%
    1  Review
    Special Price $43.54 Regular Price $61.99
    DENSO
  25. DENSO Spark Plug
    4 pc DENSO Iridium TT 4705 IKBH20TT Spark Plugs
    Special Price $48.48 Regular Price $68.99
    DENSO
  26. DENSO Spark Plug
    6 pc DENSO Iridium TT 4702 IK20TT Spark Plugs
    Special Price $50.50 Regular Price $71.99
    DENSO
  27. DENSO Spark Plug
    8 pc DENSO Iridium TT Spark Plugs for 2001-2009 Toyota Sequoia 4.7L V8
    Special Price $79.70 Regular Price $113.99
    DENSO
  28. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 1994-2006 Toyota Camry 3.0L 3.3L V6
    Special Price $61.62 Regular Price $87.99
    DENSO
  29. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 1990-1996 Nissan 300ZX 3.0L V6
    Special Price $62.88 Regular Price $89.99
    DENSO
  30. DENSO Spark Plug
    8 pc DENSO Iridium TT 4714 IT20TT Spark Plugs
    Special Price $69.00 Regular Price $98.99
    DENSO
  31. DENSO Spark Plug
    8 pc DENSO Iridium TT Spark Plugs for 1990-2000 Lexus LS400 4.0L V8
    Rating:
    100%
    1  Review
    Special Price $79.70 Regular Price $113.99
    DENSO
  32. DENSO Spark Plug
    4 pc DENSO Iridium TT 4709 IW20TT Spark Plugs
    Special Price $33.97 Regular Price $48.99
    DENSO
  33. DENSO Spark Plug
    4 pc DENSO Iridium TT 4703 IKH16TT Spark Plugs
    Special Price $37.23 Regular Price $52.99
    DENSO
  34. DENSO Spark Plug
    4 pc DENSO Iridium TT Spark Plugs for 2015-2016 Mitsubishi Outlander Sport 2.4L L4
    Special Price $43.54 Regular Price $61.99
    DENSO
  35. DENSO Spark Plug
    4 pc DENSO Iridium TT Spark Plugs for 2002-2008 Mini Cooper 1.6L L4
    Special Price $44.43 Regular Price $62.99
    DENSO
  36. DENSO Spark Plug
    4 pc DENSO Iridium TT Spark Plugs for 2001-2009 Toyota Prius 1.5L L4
    Special Price $44.43 Regular Price $62.99
    DENSO
  37. DENSO Spark Plug
    4 pc DENSO Iridium TT Spark Plugs for 2013-2016 Lexus ES300h 2.5L L4
    Special Price $46.99 Regular Price $66.99
    DENSO
  38. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 1995-2004 Toyota Avalon 3.0L V6
    Special Price $61.62 Regular Price $87.99
    DENSO
  39. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2012 Audi A7 Quattro 3.0L V6
    Special Price $61.62 Regular Price $87.99
    DENSO
  40. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2006-2008 Lexus RX400h 3.3L V6
    Special Price $61.62 Regular Price $87.99
    DENSO
  41. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 1993-1997 Toyota Land Cruiser 4.5L L6
    Special Price $62.88 Regular Price $89.99
    DENSO
  42. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2004-2008 Acura TL 3.2L 3.5L V6
    Rating:
    100%
    1  Review
    Special Price $62.88 Regular Price $89.99
    DENSO
  43. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2009-2015 Volvo XC70 3.0L 3.2L L6
    Special Price $66.81 Regular Price $94.99
    DENSO
  44. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2001-2017 Subaru Outback 3.0L 3.6L H6
    Special Price $66.81 Regular Price $94.99
    DENSO
  45. DENSO Spark Plug
    8 pc DENSO Iridium TT 4715 ITF16TT Spark Plugs
    Special Price $67.62 Regular Price $96.99
    DENSO
  46. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2007-2015 Lexus RX350 3.5L V6
    Special Price $68.17 Regular Price $96.99
    DENSO
  47. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2008-2016 Toyota Highlander 3.5L V6
    Special Price $68.17 Regular Price $96.99
    DENSO
  48. DENSO Spark Plug
    6 pc DENSO Iridium TT Spark Plugs for 2006-2012 Toyota RAV4 3.5L V6
    Rating:
    80%
    1  Review
    Special Price $68.17 Regular Price $96.99
    DENSO
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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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