Karlyn 748 Spark Plug Wire Set OE Replacement Ignition Wires

The Karlyn STI 748 is a direct-fit OE replacement spark plug wire set engineered to restore reliable ignition performance. Karlyn/STI is a leading U.S. assembler of spark plug wire sets and an original equipment supplier to Audi/VW and BMW of North America, bringing that same OE-grade quality to the aftermarket.

This wire set features Karlyn's signature 8.0mm double-extruded Silicone-over-Silicone construction, delivering two full layers of high-grade silicone insulation capable of withstanding temperatures up to 600°F. Unlike competitors that use silicone only for the outer jacket, Karlyn's dual-layer design protects against voltage leaks throughout the full length of the cable.

Key Features:

• 8.0mm Silicone-over-Silicone cable with dual-layer high-grade silicone insulation
• 19-strand tinned copper core for superior conductivity and corrosion resistance
• German-engineered spark plug connectors with permanently mounted silicone tips (no glue)
• Oversized corrosion-resistant clip-lock terminals for a positive, secure electrical connection
• 90-degree distributor boots with matching 90-degree terminals for proper fitment and feel
• Stainless steel magnetic conductive windings suppress ignition noise and RFI interference
• OEM-style connectors, looms, and harness clips included where required
• Resistant to high heat, vibration, and corrosion
• Limited warranty against factory defects

The Karlyn 748 ignition wire set is a precision-fit replacement designed to meet or exceed OEM specifications, helping restore proper ignition timing, eliminate misfires, and reduce rough idling or hesitation. Each wire is pre-cut to the correct length for a straightforward, no-modification installation.