LSX Specialties

LSX Specialties We specialize in GEN3/4 LSX engine wiring and computer tuning. Any harness work, New and Used. Custom Tailored to order. I build new as well.
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Remote tuning, DYNO tuning, Street Tuning. I specialize in reworking stock GM harnesses. When reworking your stock harness, I will make it complete and simple for any level of mechanic to easily install. It will have a 4 wire hook up, Battery power, Ignition power, Fuel pump power and ground. I leave out the engine light, TCC and tach wire for you to connect to your dash cluster. I can add relays

and wire electric fans controlled by the computer if needed for additional charges. I will leave the signal wires out if you decide to wire them yourself. All of my harnesses come with an 8 port fuse box and fuel pump relay as a standard. Any transmission wiring will also be included. If you have me work on your PCM, I can make all the changes you will need for it to run properly without all emissions and rear O2 sensors. I can adjust speedometers, rev-limiters, Fan temps, injector size and anything else you may need.

My favorite combination, LS3/TR6060. All new wiring and base tune done and shipped. All these pictures posted look the s...
06/12/2026

My favorite combination, LS3/TR6060. All new wiring and base tune done and shipped.

All these pictures posted look the same, but up close they are all build custom to the vehicle they are being installed in. Different O2 connections, Injectors, ECU locations, MAF types.

All of them are built by ME. ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ

New, GEN4 engine wiring. Build for a 6.2/8HP70(using stand alone controller). Full emissions legal swap. $825๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ
06/10/2026

New, GEN4 engine wiring. Build for a 6.2/8HP70(using stand alone controller). Full emissions legal swap.

$825

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I have had 4 appointments in a row cancelled for the Dyno. Such a waste of my time planning around that and being ready ...
06/08/2026

I have had 4 appointments in a row cancelled for the Dyno. Such a waste of my time planning around that and being ready for the appointment, then cancelled.

Starting today (6/8/2026)all appointments made will be paid in full at the time of booking. This is NON-REFUNDABLE. There will be some exceptions to this. But just not being ready when you thought you would be, is not one of them.

If this doesnโ€™t work for you, then find another dyno. Respect both of our time.

Thanks everyone!!! ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ

New, LS3/6L80E wiring harness built custom for CARTZILLA 3.0. (Las Vegas Attraction)This is built with all Emissions com...
06/05/2026

New, LS3/6L80E wiring harness built custom for CARTZILLA 3.0. (Las Vegas Attraction)

This is built with all Emissions components to pass Nevada inspection.

$825 total

Customer ride!LS3 all wired by Derek with LSX Specialties harness, Looks great!!
06/05/2026

Customer ride!

LS3 all wired by Derek with LSX Specialties harness, Looks great!!

New LSA/6L80E harness built. This is a real 2011 CTSV LSA engine using the E67 ECU.$825๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ
06/01/2026

New LSA/6L80E harness built.

This is a real 2011 CTSV LSA engine using the E67 ECU.

$825

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2011 LS3 with a 4L70E harness build. TCM and base tune supplied using customers ECU. Not a very common combination, but ...
05/28/2026

2011 LS3 with a 4L70E harness build. TCM and base tune supplied using customers ECU.

Not a very common combination, but not a problem.

$900 for this harness

New, LS3 with a 6L80E wiring done, ECU and base tune supplied also. This was $1131 shipped๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ๐Ÿ‡บ๐Ÿ‡ธ
05/22/2026

New, LS3 with a 6L80E wiring done, ECU and base tune supplied also.

This was $1131 shipped

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New, 2009 LY6 6.0 harness build and shipped.This is going into an Airboat, very custom lengths and locations of things.$...
05/19/2026

New, 2009 LY6 6.0 harness build and shipped.

This is going into an Airboat, very custom lengths and locations of things.

$775 for this

Engine horsepower is not wheel horsepower. Here is the explanation of it.
05/06/2026

Engine horsepower is not wheel horsepower. Here is the explanation of it.

Address

Medford, OR
97504

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 12pm

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