A-Premium Iridium Platinum Spark Plugs Pack of 8 — Fine-Wire for GM V8, Long Life & OE Fit

This set of eight A-Premium iridium platinum spark plugs is made for V8 applications and fits a wide range of Chevy, GMC and Cadillac engines. Combining an iridium fine-wire center electrode with a platinum-enhanced ground electrode, these plugs are designed to offer stable ignition, extended wear resistance and a precise gap for modern high-compression engines. The kit replaces several OE and aftermarket reference numbers, making it a convenient option for owners doing tune-ups on multiple model years.

Which vehicles will these A-Premium plugs fit?

These spark plugs are compatible with many GM V8 models across Chevrolet, GMC and Cadillac lines, covering model years from the late 1990s up through the 2010s. Always verify compatibility with your engine code or by cross-referencing the plug reference numbers before purchase.

• Cadillac CTS, Escalade, SRX, STS and XLR V8 model fitment
• Chevrolet Silverado, Tahoe, Avalanche, Camaro, Corvette, Colorado, Express series
• GMC Sierra, Yukon, Canyon, Savana, Envoy and other V8 variants
• Replaces references like 7397, TR5IX, XP5243 and BPR5EFVX for easier cross-checking

How do iridium and platinum electrodes benefit ignition?

Iridium and platinum are used for their hardness and high melting points, which help the electrodes resist erosion and maintain the factory gap over longer service intervals. The fine-wire iridium center electrode reduces voltage requirements for spark formation, promoting cleaner combustion and more reliable starts under a range of conditions.

• Iridium center electrode: lower voltage threshold and precise spark
• Platinum ground electrode: extended life and consistent gap retention
• Fine-wire design: improved ignitability and throttle response
• Durable construction: resists wear in high-temperature combustion environments

What should I expect during installation and maintenance?

Installation follows standard spark plug service procedures: remove old plugs, inspect threads and seats, torque to the vehicle manufacturer specification, and reconnect ignition components. Because these plugs are pre-gapped for many V8 applications, minor checking and adjustment may be all that's needed before installation.

• Check vehicle-specific torque settings; avoid over-tightening
• Inspect spark plug wells and ignition coils for damage or oil contamination
• Confirm gap and adjust only if necessary per engine specs
• Use anti-seize cautiously — follow manufacturer guidance to prevent torque errors

Who is this for? Mechanics, DIY enthusiasts and fleet owners who service GM V8 engines and want a cost-effective replacement with extended life characteristics will find this A-Premium pack suitable. It’s ideal for routine tune-ups on trucks, SUVs and performance cars where iridium and platinum plugs are recommended or where longer intervals between changes are desired. Always confirm fitment against your vehicle’s year, engine size and service manual before installation.