Ignitions and Electrical› Ignition Components

ACDelco

Iridium Spark Plug

$68.88

SKU: 41-156

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
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Easy — 1–2 hours

Overview

The ACDelco Iridium Spark Plug 41-156 is an original equipment iridium spark plug designed to provide excellent wear resistance and durability. It features an iridium composition for a high melting point and great strength. This spark plug offers reliable cold starting, smooth performance, and quick acceleration.

Its three-piece fired-in suppressor seal meters spark energy for long electrode life, prevents combustion leakage, and helps block radio frequencies that can affect vehicle electronics. The laser-welded construction ensures precision welds and increased durability.
Show original supplier description
The ACDelco GM Original Equipment Iridium Spark Plug, part number 41-156, is engineered to be an exact replacement for your vehicle's original components. This spark plug utilizes the latest in iridium technology, offering a high melting point and superior strength for exceptional wear resistance and longevity. Its design ensures excellent engine idle stability, reliable cold starting, quick acceleration, and smooth overall performance. Constructed with an iridium center electrode and a platinum ground electrode, this plug is built for durability. It features a three-piece fired-in suppressor seal that helps meter spark energy for extended electrode life, prevents combustion leakage, and blocks radio frequencies that could interfere with vehicle electronics. The laser-welded construction of ACDelco iridium plugs provides precision welds, reducing debris and wear rate for increased durability. ACDelco GM Original Equipment parts are designed, engineered, and tested to rigorous standards and are backed by General Motors. They are specifically validated for GM vehicles, ensuring they meet the exacting requirements of Chevrolet, Buick, GMC, or Cadillac. The integrated resistor reduces electromagnetic interference, contributing to smooth and reliable engine operation. Importantly, these spark plugs are factory-gapped and should not be re-gapped, as this can lead to damage.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandACDelco
Part Number41-156
CategoryIgnitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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