224W221-25-0 90° LIPPED BOOT

224W221-25-0 90° LIPPED BOOT (224W221-25-0) — 90-Degree Lipped Heat Shrink Boot for Motorsport Connector Environmental Sealing

The 224W221-25-0 is a 90-degree lipped heat shrink boot designed for medium circular connector applications. Heat shrink boots are applied at the cable entry point of a connector to provide environmental sealing, strain relief, and a professional finished appearance. This boot profile suits main MS circular connector right-angle exits, ECU connector cable routing, and any junction where a 90-degree boot redirects the harness to avoid interference. Properly installed heat shrink boots are an important element of a sealed motorsport wiring harness, protecting the connector’s cable entry from moisture ingress, fuel spray, and repeated flexing that would otherwise damage individual wire insulation at the connector rear over time.

Why Heat Shrink Boots Are Used in Motorsport Harnesses

The cable entry at the rear of a connector is one of the most vulnerable points in a motorsport wiring harness. Without a boot, individual wires exit the connector body exposed to engine bay contamination, vibration, and cyclic bending stress. A correctly specified heat shrink boot conforms to the connector body geometry and cable bundle shape to create a sealed, reinforced entry that prevents moisture from entering the connector cavity and protects wire insulation from abrasion and flexing fatigue at the connector exit point.

90-Degree Lipped Boot Profile

The 90-degree angled profile redirects the cable exit at a right angle to the connector mating face — essential where straight-exit routing would create a tight bend radius or interfere with surrounding bodywork, brackets, or adjacent connector assemblies. Main ms circular connector right-angle exits, ecu connector cable routing, and any junction where a 90-degree boot redirects the harness to avoid interference represent the typical application range for this boot profile.

Installation

Heat shrink boots are installed after connector crimping and mating. The boot is slid back along the cable bundle, the harness is routed and the connector mated, then the boot is moved forward to cover the connector entry and shrunk in place using a heat gun. Always follow the manufacturer’s shrink temperature specification to avoid over-shrinking or under-sealing the boot.

Available from Arctic Performance Parts

Arctic Performance Parts stocks a comprehensive range of heat shrink boots in straight and 90-degree profiles across all major connector families and shell sizes, supporting professional motorsport harness builders and workshops across Scandinavia. Lead time is 1–2 weeks for quantities beyond current stock.