Street-to-Trail Full Vehicle Wiring Harness

Street-to-Trail Full Vehicle Wiring Harness

Built for Pre-Runners, Desert Trucks, Ultra4, Trophy Trucks and Buggies

If you’re building a pre-runner, Ultra4 car, or a desert truck on a real-world budget and you want the lightest, quietest, most flexible harness that’s still 100% race reliable — the Tessa-wrapped TXL harness wins every time. It’s what most of the fast privateer and mid-pack unlimited guys actually run.  Customers pick the Tessa/TXL version because it’s light, cheaper, quieter, easier to work on, and still finishes punishing off-road races without electrical failures.

If you have an unlimited budget, need to check the “full mil-spec” box for class rules, or just love the aerospace look and feel — then the full Tefzel/DR-25 concentric harness is the trophy-truck standard.

Both are excellent. We build both.

When every ounce, every second, and every mile of reliability matters, this is the last wiring harness you’ll ever need to buy.

Hand-Built, Race-Proven Construction

• 100% TXL cross-linked automotive wire (thin-wall, high-temp, ultra-light)
• Fully wrapped in genuine Tessa® 51006 anti-abrasion fleece harness tape – the same tape trusted by OEMs and top desert race teams. Zero rattles, zero chafing, zero shortcuts

• The interior harness is wrapped in woven fabric tape ( "cloth harness tape") with a distinctive black diagonal stripe pattern. This is a very common style in OEM and aftermarket performance harnesses because it’s flexible, abrasion-resistant, heat-resistant, gives a clean, factory-looking finish and lends itself to easy modification on the fly. 
• Every sensor circuit is twisted (not just power/ground pairs – all sensor and signal wires too) for maximum EMI/RFI noise rejection and long-term flexibility in extreme vibration environments
• Clearly printed circuit labels for every input / output so you’re never guessing in the pits at 2 a.m.

Completely Custom – Your Spec, Your Way

You tell us exactly what you need. We build it, test it, install it or ship it.

• Choose your main connectors: Deutsch DT, DTM, HDP, Autosport, or bulkhead pass-through of your choice
• ECU / PDM connectors: Haltech, AEM Infinity, Motec, Emtron, FuelTech, Holley, Link, Power Grid – you name it, we terminate it perfectly
• Switch panel, dash, and accessory breakouts exactly where you want them
• Integrated relay/fuse block provisions or direct-to-PDM tails
• Main battery cables in  fine-strand motorsport cable with glued heatshrink and color coded boots