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DENSO Standard U-Groove 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
    DENSO Standard U-Groove 3121 K20PR-U11 Spark Plug
    Special Price $3.25 Regular Price $4.99
    DENSO
  2. DENSO Spark Plug
    8 pc DENSO Standard U-Groove 6044 W9EXR-U Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $18.95 Regular Price $26.99
    DENSO
    Out of stock
  3. DENSO Spark Plug
    6 pc DENSO Standard U-Groove 3013 W14EXR-U Spark Plugs
    Special Price $15.18 Regular Price $21.99
    DENSO
    Out of stock
  4. DENSO Spark Plug
    8 pc DENSO Standard U-Groove 4046 W27ES-U Spark Plugs
    Special Price $16.45 Regular Price $22.99
    DENSO
  5. DENSO Spark Plug
    6 pc DENSO Standard U-Groove 3119 K16R-U Spark Plugs
    Special Price $15.18 Regular Price $21.99
    DENSO
  6. DENSO Spark Plug
    DENSO Standard U-Groove 4096 X24EPR-U9 Spark Plug
    Special Price $3.48 Regular Price $4.99
    DENSO
  7. DENSO Spark Plug
    2 pc DENSO Standard U-Groove 4030 W24ES-U Spark Plugs
    Special Price $4.78 Regular Price $6.99
    DENSO
  8. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 5031 T20EP-U Spark Plugs
    Special Price $8.49 Regular Price $11.99
    DENSO
  9. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 4101 X24ESR-U Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $11.55 Regular Price $16.99
    DENSO
  10. DENSO Spark Plug
    8 pc DENSO Standard U-Groove 3122 K20R-U Spark Plugs
    Special Price $20.37 Regular Price $28.99
    DENSO
  11. DENSO Spark Plug
    6 pc DENSO Standard U-Groove Spark Plugs for 1991-1995 GMC Sonoma 4.3L V6
    Special Price $25.14 Regular Price $35.99
    DENSO
  12. DENSO Spark Plug
    6 pc DENSO Standard U-Groove 3381 K20HR-U11 Spark Plugs
    Rating:
    20%
    1  Review
    Special Price $35.89 Regular Price $50.99
    DENSO
  13. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 3031 W16EXR-U Spark Plugs
    Special Price $9.72 Regular Price $13.99
    DENSO
  14. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 4099 X24ES-U Spark Plugs
    Special Price $10.74 Regular Price $14.99
    DENSO
  15. DENSO Spark Plug
    6 pc DENSO Standard U-Groove 4030 W24ES-U Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $12.56 Regular Price $17.99
    DENSO
  16. DENSO Spark Plug
    6 pc DENSO Standard U-Groove 6044 W9EXR-U Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $14.14 Regular Price $19.99
    DENSO
    Out of stock
  17. DENSO Spark Plug
    8 pc DENSO Standard U-Groove 5000 L14-U Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $28.31 Regular Price $39.99
    DENSO
  18. DENSO Spark Plug
    DENSO Standard U-Groove 3021 W16EPR-U Spark Plug
    Special Price $3.32 Regular Price $4.99
    DENSO
  19. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 6027 W22MP-U Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $8.49 Regular Price $11.99
    DENSO
  20. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 4052 W27FS-U Spark Plugs
    Special Price $8.67 Regular Price $11.99
    DENSO
  21. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 3119 K16R-U Spark Plugs
    Special Price $10.41 Regular Price $14.99
    DENSO
  22. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 3137 Q16PR-U Spark Plugs
    Special Price $10.41 Regular Price $14.99
    DENSO
  23. DENSO Spark Plug
    6 pc DENSO Standard U-Groove 5031 T20EP-U Spark Plugs
    Special Price $12.30 Regular Price $17.99
    DENSO
  24. DENSO Spark Plug
    6 pc DENSO Standard U-Groove 3034 W16FS-U Spark Plugs
    Special Price $12.56 Regular Price $17.99
    DENSO
  25. DENSO Spark Plug
    6 pc DENSO Standard U-Groove 5018 QJ16HR-U Spark Plugs
    Special Price $18.11 Regular Price $25.99
    DENSO
  26. DENSO Spark Plug
    4 pc DENSO Standard U-Groove Spark Plugs for 2001-2004 Toyota Tacoma 2.4L 2.7L L4
    Special Price $18.81 Regular Price $26.99
    DENSO
  27. DENSO Spark Plug
    6 pc DENSO Standard U-Groove Spark Plugs for 1999-2013 Chevrolet Silverado 1500 4.3L V6
    Special Price $25.04 Regular Price $35.99
    DENSO
  28. DENSO Spark Plug
    8 pc DENSO Standard U-Groove Spark Plugs for 2001-2004 Toyota Sequoia 4.7L V8
    Special Price $30.88 Regular Price $43.99
    DENSO
  29. DENSO Spark Plug
    8 pc DENSO Standard U-Groove Spark Plugs for 1988-1995 Chevrolet C1500 5.0L 5.7L 7.4L V8
    Special Price $31.71 Regular Price $44.99
    DENSO
  30. DENSO Spark Plug
    6 pc DENSO Standard U-Groove Spark Plugs for 2003-2007 Infiniti G35 3.5L V6
    Special Price $42.68 Regular Price $60.99
    DENSO
  31. DENSO Spark Plug
    6 pc DENSO Standard U-Groove Spark Plugs for 2015-2016 Kia Sedona 3.3L V6
    Special Price $46.75 Regular Price $66.99
    DENSO
  32. DENSO Spark Plug
    4 pc DENSO Standard U-Groove Spark Plugs for 2006-2011 Honda Civic 1.8L 2.0L L4
    Special Price $19.20 Regular Price $26.99
    DENSO
  33. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 3129 Q16R-U Spark Plugs
    Special Price $10.63 Regular Price $14.99
    DENSO
  34. DENSO Spark Plug
    6 pc DENSO Standard U-Groove Spark Plugs for 1984-1986 Ford Mustang 3.8L V6
    Special Price $23.67 Regular Price $33.99
    DENSO
  35. DENSO Spark Plug
    4 pc DENSO Standard U-Groove Spark Plugs for 2009-2010 Toyota Venza 2.7L L4
    Special Price $30.34 Regular Price $42.99
    DENSO
  36. DENSO Spark Plug
    DENSO Standard U-Groove 3120 K16R-U11 Spark Plug
    Special Price $3.32 Regular Price $4.99
    DENSO
  37. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 4046 W27ES-U Spark Plugs
    Special Price $8.67 Regular Price $11.99
    DENSO
  38. DENSO Spark Plug
    6 pc DENSO Standard U-Groove 4046 W27ES-U Spark Plugs
    Special Price $12.56 Regular Price $17.99
    DENSO
  39. DENSO Spark Plug
    4 pc DENSO Standard U-Groove Spark Plugs for 2015 Scion xB 2.4L L4
    Special Price $19.20 Regular Price $26.99
    DENSO
  40. DENSO Spark Plug
    8 pc DENSO Standard U-Groove 3119 K16R-U Spark Plugs
    Special Price $19.95 Regular Price $28.99
    DENSO
  41. DENSO Spark Plug
    6 pc DENSO Standard U-Groove Spark Plugs for 1977-1986 Chevrolet K30 4.8L L6
    Special Price $24.16 Regular Price $34.99
    DENSO
  42. DENSO Spark Plug
    8 pc DENSO Standard U-Groove Spark Plugs for 1990-2000 Lexus LS400 4.0L V8
    Special Price $30.26 Regular Price $42.99
    DENSO
  43. DENSO Spark Plug
    8 pc DENSO Standard U-Groove Spark Plugs for 2010-2016 Lexus GX460 4.6L V8
    Special Price $60.11 Regular Price $85.99
    DENSO
  44. DENSO Spark Plug
    DENSO Standard U-Groove 6023 W20MP-U Spark Plug
    Special Price $2.83 Regular Price $3.99
    DENSO
  45. DENSO Spark Plug
    DENSO Standard U-Groove 3165 K22PR-U Spark Plug
    Special Price $3.36 Regular Price $4.99
    DENSO
  46. DENSO Spark Plug
    2 pc DENSO Standard U-Groove 6023 W20MP-U Spark Plugs
    Special Price $4.68 Regular Price $6.99
    DENSO
  47. DENSO Spark Plug
    DENSO Standard U-Groove 6076 K16HPR-U11 Spark Plug
    Special Price $6.04 Regular Price $8.99
    DENSO
  48. DENSO Spark Plug
    4 pc DENSO Standard U-Groove 3089 W22EPR-U11 Spark Plugs
    Special Price $7.11 Regular Price $9.99
    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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100% fitment guarantee at sixityauto.com

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