X4XZ Double Iridium Spark Plugs 41-109 6-Pack — Direct-Fit for GM V6 3.6L, Long-Life Ignition

X4XZ 41-109 double iridium spark plug 6-pack delivers durable, high-ignitability replacement ignition for compatible GM V6 engines.

These double iridium spark plugs are engineered to match or improve on original equipment specifications for many GM models, offering longer service life, reliable starts and consistent combustion. Designed as a direct-fit replacement with OE references including 41-109 and compatible cross-numbers, this set of six helps restore engine smoothness and throttle response when aging or fouled plugs cause rough idling or weak acceleration.

Which vehicles and engines will these spark plugs fit?

The X4XZ 41-109 plugs fit a wide range of GM V6 applications across Cadillac, Chevrolet, GMC, Buick and Saturn models, mainly 3.6L and selected 3.0L engines from model years around 2010–2018. Check the listed cross-reference numbers against your vehicle's original part number before purchasing to ensure correct fitment.

• Cadillac: ATS 2013–2015 3.6L; CTS 2010–2015 3.0L/3.6L; SRX 2010–2016 3.6L/3.0L; STS 2010–2011 3.6L; XTS 2013–2018 3.6L.
• Chevrolet: Camaro 2010–2015 3.6L; Caprice 2012–2017 3.6L; Colorado 2015–2016 3.6L; Equinox 2010–2015/2012–2017 3.0L/3.6L; Impala and Traverse fits noted years.
• GMC, Buick, Saturn: Acadia/Terrain/Canyon fits and Buick Enclave/LaCrosse plus Saturn Outlook/Vue V6 models as listed.

How do double iridium spark plugs improve engine performance?

Iridium center electrodes provide a harder, finer firing tip than standard materials, requiring less voltage to produce a strong spark. That leads to better ignitability, quicker starts and more complete fuel combustion without changing your engine management system.

• Finer electrode tip improves spark focus and reduces misfires.
• Higher durability extends service intervals—rated for long operating life up to about 100,000 kilometers.
• Consistent spark reduces rough idling and enhances throttle response.

What are the exact part references and what's included in the package?

The primary part number for this set is OE# 41-109. It also replaces common cross-reference numbers such as 41109, 90117, APP5683, PTV16TT, QSP5 and 12622561 ILT6RE11. The product ships as a pack of six double iridium spark plugs.

• Includes: X4XZ Double Iridium Spark Plug × 6 (no instruction manual included).
• Primary OE reference: 41-109; multiple compatible cross-numbers provided for verification.
• Designed for fast, straightforward swap-in replacement of worn OE plugs.

Are these plugs easy to install and is support available if needed?

Installation follows the same basic procedure as original spark plugs; torque, gap and ignition coil handling should follow your vehicle manufacturer's instructions. The design matches OE dimensions to simplify fitment, and the seller offers customer support for product or installation questions.

• Sold without a printed manual—refer to vehicle service documentation for torque and gap specs.
• 24-hour customer service and one-year product support from the seller.
• Match plug type and cross-reference numbers before fitting to avoid installation issues.

Who is this for? Drivers and technicians who maintain GM V6 vehicles (notably Cadillac, Chevrolet, GMC, Buick and Saturn models listed) and seek a long-life, high-ignitability replacement spark plug will benefit from the X4XZ 41-109 double iridium 6-pack. It's aimed at owners wanting better starts, steadier idle and longer service intervals than standard plugs provide, while keeping compatibility with original engine specs.