Electrical systems don’t have to be a mystery.
Whether you’re building a hot rod, restoring a classic, or repowering an off-road rig, Custom Circuitry delivers clean, documented, plug-and-play wiring solutions — built with the same precision trusted in aerospace launch systems.

Why Builders Choose Us:

• Cleaner than any box-store “universal kit”

• Built to spec, not cobbled together

• Labeling + documentation = fast, safe install

Built by a Certified Aerospace Harness Technician

These harnesses are built using the same practices applied to:

• SpaceX Falcon 9 launch systems
• Blue Origin’s Blue Moon and New Glenn spacecraft
• Airbus-OneWeb’s LEO satellite constellations

Built by hand. Crimped with calibrated tooling. Labeled and documented like a real mission.

Any hot rod, airboat, or swap build can look clean from the outside — but under the dash is often a disaster waiting to happen.

Universal wiring kits? Sure, they’re cheap — but they’re also generic, untested, and filled with uncut, unlabeled wires, often using aluminum strands or weak insulation. Miss a ground or overload a wire, and you’re chasing shorts instead of horsepower.

Custom Circuitry harnesses are pre-labeled, tested, and professionally built using GPT/TXL or Tefzel® wire, crimped with calibrated aerospace tools. You install them once — and never think about them again.

A cheap harness isn’t just inconvenient. It’s the fastest way to turn your project into a garage fire.