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)


  • Reliable performance
  • Reduces engine knocking
  • Great fuel efficiency


  • 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.


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.