ACDelco 41-993 Professional Iridium Spark Plugs are a top-of-the-line choice for most vehicle models. These plugs are manufactured to meet rigorous quality requirements and ensure excellent fuel economy and smooth performance.

Key Features

  • Iridium construction
  • One-piece suppressor seal
  • Reduces Radio Frequency Interference (RFI)

Features and Specs for Each Model

  • Thread size: 14mm
  • Thread Pitch: 1.25mm
  • Hex size: 5/8″ (16mm)

Pros

  • Reliable performance
  • Reduces engine knocking
  • Great fuel efficiency

Cons

  • It may not be compatible with all vehicle models

Amazon Customer Review

★★★★★ “These plugs made my old car run like new again! Great performance and fuel economy!” – Sarah W.

Conclusion

If you’re looking for a durable and efficient spark plug, ACDelco 41-993 is an excellent choice. Though compatibility may be an issue for some, its performance makes it worth considering.

NGK 3951 Spark Plugs TR55 (6 Pack)
4.7 out of 5 stars(4269)
Available for Amazon Prime 35% Off $28.82 $18.59 (as of April 25, 2025 18:36 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Designed to operate over a much wider heat range t... read more
NGK Spark Plug BKR5E-11- Set of 4
4.8 out of 5 stars(152)
Available for Amazon Prime $13.98 (as of April 25, 2025 11:04 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
4 pack NGK V-Power 6953 Spark Plug Genuine NGK Par... read more
NGK 3951 Spark Plugs TR55 (8 Pack)
4.6 out of 5 stars(4602)
Available for Amazon Prime 22% Off $29.82 $22.99 (as of April 25, 2025 19:08 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Often specified as original equipment, NGK spark p... read more
Champion RC12YC Spark Plug, Pack Of 4
4.7 out of 5 stars(1370)
6% Off $13.89 $12.95 (as of April 25, 2025 14:09 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
4 pack Champion Copper Plus 71 Spark Plug Genuine ... read more