K-Series Tucked Engine Harness for Honda/Acura K-Swap | K20 K24 | RSX Civic Si EP3

K-Series Tucked Engine Harness — Built for Clean K-Swaps

Upgrade your K-swap build with a harness engineered for performance, reliability, and a factory-clean finish. The K-Series Tucked Engine Harness is a premium replacement for the 02–04 RSX Type-S harness, purpose-built to work seamlessly with nearly all K-Series engine swaps. Whether you're running a K20 or K24, this harness delivers a professional tucked layout that looks as good as it performs.

Vehicle Applications

• K-Swap Cars (universal fitment)
• 2002–2004 RSX Type S
• 2002–2004 RSX Base
• 2001–2005 Civic EP3 (Type S or K24 Swap)

⚠ Important Notes: New design uses factory RSX connectors. Will NOT fit RHD or RWD vehicles.

Why Choose This Harness?

Every harness is hand-inspected and tested before shipping — because in motorsport, there's no room for wiring failures. We've used only SAE-certified automotive-grade wiring resistant to moisture and most solvents, wrapped in military-grade heat shrink loom rated from -55°C to 150°C (-67°F to 320°F) and resistant to gas and diesel. The result is a harness built to last through track days, daily drives, and everything in between.

The tucked wire layout routes the main harness over the valve cover, hiding injector plugs beneath the manifold for an ultra-clean engine bay. RDX injector plugs are included and can be swapped into OEM RSX Type-S 310cc plugs quickly and easily.

Features

• All plugs included (except EVAP and AC)
• SAE Certified automotive-grade wiring — moisture and solvent resistant
• Military-grade heat shrink loom — gas & diesel resistant, rated -55°C to 150°C
• Tucked design — harness runs over valve cover (compatible with coil pack cover)
• Injector wiring routes from under manifold between middle runners
• Works with fuse box in stock location or relocated under dash
• Ground wire relocated to stud under coil pack cover
• Single wire temp sensor wire included (for K-swap cars with stock cluster)
• 3 Aux wires run from ECU to under intake manifold — 2 ECU pins pre-installed
• Wiring length supports both VSS low and high frequency (high frequency requires repinning & minor VSS modification)
• Extra knock sensor plug included
• All plugs clearly labeled for simple, confusion-free installation
• RSX injector plugs standard; RDX injectors easily switched
• Each harness individually inspected and tested before shipping

Stop fighting messy wiring. Build it right the first time with a harness designed by enthusiasts, for enthusiasts.