Shrink Sleeve W/Numbers

The Taylor/Vertex Shrink Sleeve with Numbers is a numbered 1-8 spark plug wire identification and organization tool designed for engine builders, mechanics, and automotive enthusiasts who demand precision in ignition system setup. Whether you're tuning a high-performance engine, diagnosing misfires, or simply maintaining factory-correct wire routing, this shrink sleeve system eliminates guesswork and prevents costly firing-order mistakes. Clear, durable numbering makes it easy to trace each wire back to its cylinder during installation, testing, or troubleshooting.

Each shrink sleeve features permanent printed numerals (1 through 8) that remain legible even after years of underhood exposure to heat, oil, and vibration. The thin-wall design slips over standard spark plug wires without restricting flexibility or requiring wire removal, making installation quick and non-invasive. The compact 2.9 x 0.75 x 3.25-inch form factor ensures these sleeves won't interfere with adjacent engine components, while the minimal 0.02 lbs weight adds no burden to your ignition harness. This approach maintains factory harness geometry and routing paths, critical for avoiding cross-fire and EMI issues in modern engine management systems.

Mechanics benefit most when rebuilding or modifying multi-cylinder engines where spark plug wire routing can become ambiguous, and engine diagnosticians rely on correct firing order identification when testing individual cylinders or tracking down intermittent ignition faults. This product is compatible with 8-cylinder engines running traditional plug-wire ignition systems—from classic muscle cars to modern domestic V8 platforms. The Taylor/Vertex shrink sleeve system also serves as an essential reference during performance tuning sessions, allowing technicians to verify proper cylinder sequencing before fine-tuning timing and load curves.