Karlyn 660 Spark Plug Wire Set

Karlyn-STI 660 Spark Plug Wire Set

The Karlyn-STI 660 spark plug wire set is built for 1997-1999 Subaru Legacy applications that use an OEM-style ignition layout. It features blue wire construction with OEM boot type and OEM engine fitment details for a direct-match service part.

Key Features

• Fits 1997-1999 Subaru Legacy with SAE pin type coil distributor setup
• OEM boot type for factory-style connection points
• Blue wire set for easy visual identification in the engine bay
• OEM engine specification for application-matched ignition service
• Part number 660 for accurate ordering and catalog lookup

Application Details

Use the Karlyn-STI 660 when servicing ignition wire routing on Subaru Legacy models from 1997 through 1999. The spark plug connector has an oval top with a taper, and the application notes specify use with an SAE pin type coil distributor. This part number 660 is listed for the Subaru Legacy and is intended for OE-style replacement in the ignition wire and related components category.

What It Helps Address

• Misfires caused by worn or deteriorated plug wires
• Hard starting related to weak ignition transfer
• Rough idle from inconsistent spark delivery
• Voltage leakage from cracked or aged wire insulation
• Incorrect connector fit at the coil or spark plug end

Installation Notes

Confirm the vehicle uses the SAE pin type coil distributor arrangement and the oval-top, tapered spark plug connector profile before installation. Route the wires to match the original layout and verify each connection seats fully at the coil and spark plug ends. For fitment reference, this part fits 1997-1999 Subaru Legacy, N/A.

Quality Assurance

Karlyn-STI focuses on OE-style ignition service parts with application-specific boot and connector details. Part number 660 is cataloged for the listed Subaru Legacy fitment to support accurate replacement selection.