KLP Spark Plug Wire Harness 686494015630 for Chevrolet BBC350/383/454

Chevrolet BBC series engine V8 350/383/454 with KLP spark plug wire harness (part number 686494015630) as an ideal replacement; perfectly fits most trucks and high-performance models built 1970–1990. This harness precisely transmits high-voltage from ignition coil to each spark plug, ensuring combustion efficiency and stable power output. OEM number 686494015630 can be cross-checked with original parts; avoid compatibility errors. Replacement difficulty: medium; use dedicated spark plug wire harness pliers for installation and observe firing order.