PRE PRINTED MARKERS COIL 1-16 YELLOW 1/4″

Coil 1–16 Pre-Printed Markers — Yellow 1/4″ Heat Shrink — Motorsport Harness Circuit Identification

The COIL116 is a set of pre-printed “COIL 1” through “COIL 16″ yellow heat shrink identification markers in 1/4” diameter, covering the full ignition coil circuit numbering range from a single to a 16-cylinder or 16-channel ignition system. Pre-printed heat shrink markers provide permanent, professional circuit identification that is applied once and remains legible throughout the vehicle’s racing life, unlike adhesive labels that peel, hand-written markings that fade, or colour-coded sleeves that identify circuit type without naming the specific circuit. These markers are suited to ignition coil circuit identification across all engine configurations from 4-cylinder through V12 and beyond, individual coil driver wire marking at ECU output connectors and coil connector ends, and systematic ignition harness documentation on any race engine.

Why Pre-Printed Markers Are the Professional Standard

A professional motorsport harness is built and documented to a wiring schematic where every circuit has a unique identifier. Applying pre-printed identification markers at every connector termination and breakout point means any circuit can be identified by name at a glance from anywhere along the harness — the MAP sensor wire at the ECU connector, at the sensor end, and at every breakout point in between all read “MAP.” This level of documentation discipline transforms fault diagnosis at the track from a process requiring a schematic and test equipment into a visual check that any competent mechanic can perform quickly under race pressure.

Heat Shrink Base — Permanent Circuit Labels

Pre-printed heat shrink markers use a heat-activated shrink sleeve as the carrier for the printed text. When heat is applied, the sleeve shrinks firmly onto the wire insulation, and the shrink process sets the adhesive or locks the printed surface in position permanently. The result is a label that cannot peel, shift along the wire, or be removed accidentally — unlike wrap-around labels or cable tie flags that are common in lower-specification harness builds. Heat shrink markers also resist the fuel, oil, and cleaning chemicals present in a motorsport engine bay environment, where adhesive labels typically fail within a single season.

Available from Arctic Performance Parts

Arctic Performance Parts stocks pre-printed heat shrink marker kits and individual circuit label sets covering all standard engine management circuit identifiers, numbered injector and coil sequences, and sensor-specific labels to support systematic motorsport harness documentation across Norway, Sweden, and Denmark. Lead time 1–2 weeks for quantities beyond current stock.