AUTOLITE 3924

Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on Autolite copper plugs for performance and value, backed by decades of experience and passion.

Features & Benefits:

• Guaranteed to deliver quick starts, good fuel economy and smooth acceleration.
• Copper core center electrode for higher thermal conductivity
• Specially engineered high nickel alloy center and ground electrode for extended life
• High alumina ceramic for high dielectric strength
• Leak proof, heat fused internal seal for durability
• Multi-rib insulator prevents flash-over

Which AUTOLITE Spark Plug Is Right For You?

Material / Series	Lifespan / Durability	Performance / Ignitability	Efficiency / Fuel Economy
Copper / Nickel	★	★
Platinum	★★★	★★	★
Double Platinum	★★★★	★★	★
Iridium XP	★★★★★	★★★★★	★★
Iridium Ultra	★★★★★★	★★★★★	★★

AUTOLITE Warranty Information:2 years for Copper Spark Plugs; 4 years for Platinum Spark Plugs; 5 years for Double Platinum Spark Plugs; Limited Lifetime years for Iridium XP Spark Plugs; 5 years for Professional Series Wire Sets; 1 year for Glow PlugsWarranty Details

CAPA Certified or NSF Certified parts bear the seal of independent, third party organizations guaranteeing fitment and quality equal to original equipment. These parts may be required if your insurance company is paying for the repair.