Prior to 1986, the 240's wiring harness routes the full headlight operating voltage right through the headlight switch.  For 86 on, voltage is managed by a relay, but the relay is mounted either near the firewall under the dash, or worse, in later models, below the center dash AC vents.  All of this distance not only causes a voltage drop, but higher wattage bulbs will result in melted switches and relay plugs eventually.  Here's the solution!  These harnesses mount the relays close to the battery and headlights.  The original switching operates ONLY the control function of the harness, which draws very little current.  Maximum voltage with minimum run length to the lights improves output.  Harnesses have independent relays and fuses for high and low beam circuits.  All wires are sized correctly for easy installation.  GXL, automotive grade wire throughout.  Headlight plugs are high temp resin, good to over 400 degrees F.  10 gauge power leads.  14 gauge headlight leads.

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$209 each, shipped, in the Contiguous United States.  Please contact us for quotes to other locations via the links for each item.  Custom quotes available, see below.  

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Running plastic lenses in your 86-93 US Spec car and need an upgrade?  Our 9004 to 9004 harness will allow you to run 100/80 watt bulbs without the danger of melting your existing electrics. 

Includes Hella bulbs, $229 CONUS.

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All "buy it now" buttons are for 49 state shipping in the United States--NOT including  California.  For California, we must add sales tax.  Message us for a quote please.  

International?  Please message for a quote if you are outside the US, and/or your Bank is not US based.