ACDelco 904D Professional Spark Plug Wire Set - Fiberglass & Silicone Ignition Wires

The ACDelco 904D Professional Spark Plug Wire Set delivers premium ignition performance as a high-quality aftermarket replacement for a wide range of domestic and import vehicles. Engineered to match OE fit, form, and function, these spark plug wires are built to restore reliable engine ignition and consistent spark delivery.

Key Features:

• Fiberglass-reinforced construction — strength-enhancing fiberglass braid provides structural integrity and resistance to engine heat and vibration
• High-temperature silicone insulation — withstands extreme underhood temperatures while protecting against electrical interference
• Carbon latex reactive layer — provides a secondary layer of protection over stainless windings for added durability and conductivity
• Secure terminal design — improves spark plug retention, eases installation, and offers excellent corrosion resistance
• Full set included — complete wire set with connectors and insulating boots for a straightforward, complete replacement
• Broad vehicle coverage — part of a line covering over 96% of domestic vehicles, with applications for GM, Chrysler, Ford, Honda, Nissan, and Toyota

Spark plug wires transfer high-voltage pulses from the ignition source through the distributor to each spark plug. Worn or damaged wires can cause rough idling, engine misfires, hard starting, and reduced fuel economy. The ACDelco 904D restores proper ignition function and helps maintain peak engine performance.

Installation Tips:

• Always remove wires by gripping the boot — never pull by the wire itself
• Route and secure wires in their original positions using factory hold-downs
• Keep wires clear of contact with other engine components to prevent abrasion and heat damage