NGK 51140 Spark Plug Wire Set

NGK Spark Plug Wire Set 51140

The NGK Spark Plug Wire Set 51140 is a specific-fit ignition wire set built for select Pontiac, Buick, and Oldsmobile applications. It uses silicone insulation and noise suppression construction to support stable ignition performance and reduced electrical interference.

Key Features

• Specific-fit spark plug wire set for direct application matching
• Silicone insulation for heat resistance and durability
• Noise suppression design helps reduce ignition interference
• SMag core material for consistent electrical transfer
• Blue insulation for easy visual identification

Detailed Description

NGK 51140 is part of the NGK Spark Plug Wire Set line, a product family focused on ignition replacement parts for domestic and import vehicles. This wire set is engineered with a 7.00 mm outside diameter insulation and a suppression-style core to maintain reliable spark delivery while helping control radio-frequency noise. It is a direct replacement style ignition wire set for vehicles that require this specific configuration. This part cross-references Bosch 7431 and Delphi XS10289 for the same application.

Compatible with select Pontiac Sunbird, Pontiac LeMans, Pontiac Optima, Pontiac Grand Am, Buick Skyhawk, and Oldsmobile Firenza applications. Fits 1987-1991 Pontiac Sunbird, N/A; Fits 1989-1990 Pontiac LeMans, N/A; Fits 1988-1990 Pontiac Optima, N/A; Fits 1987-1989 Pontiac Grand Am, N/A; Fits 1987-1988 Buick Skyhawk, N/A; Fits 1987-1988 Oldsmobile Firenza, N/A.

What It Is Used For

• Replacing worn ignition wires that can weaken spark delivery
• Reducing misfires caused by deteriorated insulation or core wear
• Limiting ignition noise that can affect electrical performance
• Restoring consistent engine starting and running behavior

Installation Notes and Tips

Verify the vehicle application against the part number 51140 before installation. Route each wire to match the original layout and keep the wires separated from hot exhaust components and moving parts. Confirm terminal engagement at the spark plug and ignition connection points to avoid intermittent spark loss.

Quality Assurance

NGK brings more OE ignition expertise globally than any other brand and manufactures premium ignition products to meet OE standards. Part number 51140 reflects NGK's focus on durability, operational performance, and specific-fit replacement coverage.