Ozikutech Iridium Spark Plugs 8-Pack for GM LS V8 Engines — Pre-gapped 0.04 in, Long Life

Ozikutech 8 Pack Iridium Spark Plugs are high-performance replacement plugs engineered to fit a wide range of GM V8 engines, offering precise 0.04" pre-gap ignition and OEM-equivalent compatibility for Chevy, GMC, Cadillac and more.

These iridium plugs are manufactured as direct replacements for several GM OEM part numbers (including 41-110, 41-162, 41-985, 19417055 and others) to serve LS-series and related V8 engines. Sold in an eight-piece set, they are sized and gapped for reliable combustion in trucks, SUVs and performance cars from late 1990s through the 2010s. The design focuses on a fine iridium center electrode for consistent spark, long wear life and straightforward installation using factory coils.

Which vehicles will these spark plugs fit?

These plugs cover a broad list of GM vehicles with V8 LS-family engines and related platforms. They match many Chevrolet, GMC, Cadillac, Buick, Pontiac and Hummer model years where the OEM numbers listed are specified.

• Chevy: Silverado, Tahoe, Suburban, Corvette, Camaro, Impala, Avalanche, Express, Colorado, SSR, Caprice, SS
• GMC: Sierra, Yukon, Savana, Canyon, Envoy and various HD / Classic years
• Cadillac/Buick/Pontiac/Hummer: Escalade family, CTS, Rainier, LaCrosse, GTO, Firebird, H2/H3
• Direct-replacement part references included: 41-110, 41-162, 41-985, 9602, 19417055, 12621258, 12680072

How do these iridium plugs affect performance and longevity?

Iridium is harder and finer than conventional electrode metals, which helps form a smaller, more focused spark. That typically improves combustion stability and extends service life compared to standard copper plugs—especially under heavy-duty and high-mileage use.

• Fine iridium center electrode for efficient spark delivery and reduced misfires
• Pre-set 0.04" (1 mm) gap to match factory ignition requirements
• Durable materials provide longer intervals between replacements
• Designed to tolerate highway loads and towing conditions

Are these plugs easy to install and are any adjustments required?

Yes. The Ozikutech plugs come pre-gapped to 0.04" which usually matches OEM specifications for the listed engines, so no gap shims are necessary for a correct install. They are designed to work with original ignition coils; standard hand tools and basic mechanical knowledge are sufficient for installation.

• Pre-gapped 0.04" reduces install prep and risk of incorrect gap
• Fitment intended for factory coil-on-plug setups found on LS engines
• Torque to manufacturer torque specs; avoid over-tightening
• Recommended to replace in sets (one pack covers eight cylinders)

What should I check before buying to ensure fitment?

Confirm your vehicle’s model year, engine displacement and the OEM spark plug part number in your owner’s manual or parts catalog. Cross-reference the listed replacement numbers and engine families; if your VIN engine code matches an LS1/LS2/LS3/LS6/L99 or corresponding V8 used in the compatibility list, these plugs should be correct.

• Match engine size and model year against the compatibility list
• Verify OEM part numbers such as 41-110 or 19417055 in vehicle records
• Check whether your vehicle uses coil-on-plug ignition
• When uncertain, consult a dealer or trusted mechanic with VIN

Who is this for: Professional mechanics and DIY enthusiasts who own or service GM V8 trucks, SUVs and performance cars from the late 1990s through the 2010s and want a cost-effective, long-wearing iridium replacement that meets OEM fitment and pre-gap specifications. Ideal when replacing all eight plugs to restore consistent ignition, reduce misfires and maintain engine responsiveness without requiring aftermarket ignition modifications.