Iridium Spark Plug Set 41-156 41-993 41-114 41-110 41-101 41-103 41-109 41-108 | For Buick Chevrolet Cadillac GMC Hummer

This set of 8 iridium spark plugs covers multiple OEM part numbers including 41-156, 41-993, 41-114, 41-110, 41-101, 41-103, 41-109, and 41-108. It is designed for a wide range of vehicles from Buick, Chevrolet, Cadillac, GMC, and Hummer. Each plug is built with an iridium electrode for reliable ignition and long service life.

Replacing old or worn spark plugs helps restore engine performance, improve fuel efficiency, and deliver smoother acceleration. These plugs are a direct replacement for OEM part number 12620540 and come ready to install in compatible engines.

Each spark plug features a flat mounting base and new condition components. The iridium electrode material provides consistent spark output under various driving conditions, helping your engine start quickly and run smoothly.

This lot contains 8 plugs, making it a complete set for most V8 engines or a full replacement for four- and six-cylinder vehicles. Whether you are doing routine maintenance or a performance refresh, this set gives you the parts you need in one package.

Key Features and Benefits

- Iridium electrode material that delivers a strong, consistent spark for reliable ignition

• Compatible with multiple OEM numbers (41-156, 41-993, 41-114, 41-110, 41-101, 41-103, 41-109, 41-108) that fits a wide range of GM vehicles

• Direct interchange for OEM part number 12620540 that simplifies replacement

• Flat mounting base that ensures a secure fit in the cylinder head

• New condition components that provide fresh performance compared to worn plugs

• 8-piece set that covers a full engine replacement in one purchase

Who Is This For

- DIY car owners looking to replace worn spark plugs on their Buick, Chevrolet, Cadillac, GMC, or Hummer

• Mechanics and garages needing a multi-fit spark plug set for common GM engines

• Vehicle enthusiasts performing routine maintenance to keep their engine running at peak efficiency

Usage Scenario

Mike noticed his Chevrolet Silverado was idling rough and struggling during acceleration. Instead of taking it to the shop and paying for labor, he ordered this 8-piece iridium spark plug set. After watching a quick tutorial, he replaced the old plugs in his driveway. The truck started immediately, idled smoothly, and felt more responsive on his next drive to work.

Micro Comparison

Standard copper spark plugs wear out faster and require more frequent replacement. This iridium set offers a longer service life and better spark consistency, especially under high-temperature conditions. For drivers who want a reliable replacement that matches multiple OEM part numbers, this set provides a cost-effective solution without sacrificing quality.

Specifications

- Electrode Material: Iraurita (iridium alloy)

• Condition: New

• Mounting Base: Flat

• Interchange Part Number: 12620540

• OEM Part Numbers: 41-156, 41-993, 41-114, 41-110, 41-101, 41-103, 41-109, 41-108

• Package: Bubble bags + inner box + outer carton

Package Includes

- 8 x Iridium Spark Plugs

Why You Will Love It

You get a complete set of 8 iridium spark plugs that cover multiple GM vehicle models with one simple purchase. The iridium electrode helps your engine start faster and run smoother, saving you trips to the mechanic. It is a straightforward upgrade that brings back the performance you expect from your vehicle.

Questions and Answers

Question: Will these spark plugs fit my 2015 Chevrolet Tahoe?

Answer: These plugs are compatible with many GM vehicles including the Chevrolet Tahoe. Check your engine requirements against the OEM numbers 41-156, 41-993, 41-114, 41-110, 41-101, 41-103, 41-109, or 41-108.

Question: How many spark plugs come in this set?

Answer: This set includes 8 spark plugs, enough for a complete replacement on most V8 engines or a full set for four- and six-cylinder engines.

Question: Are these plugs pre-gapped?

Answer: The spark plugs are new, but we recommend checking the gap with a gapping tool before installation to match your vehicle's specifications.

Question: Can I use these plugs in a Cadillac Escalade?

Answer: Yes, these plugs are listed for Cadillac vehicles and cover multiple OEM part numbers including 41-110 and 41-108, which are commonly used in Escalade models.

Question: What is the electrode material made of?

Answer: The electrode is made of iraurita, an iridium alloy that provides long-lasting performance and consistent spark output.