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Welcome ! Please let us know if you need any help. For other T-harness options please visit T-harness.com. Thank you
Welcome ! Please let us know if you need any help. For other T-harness options please visit T-harness.com. Thank you

Our products are NOT sold at any AUDIO SHOPS or online retailers, however knock off copies are, be aware dont pay more for less. Stay authentic 👽... Instock product ship the following business day!

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GMC Sierra Amp Rack pickup back wall 56" 2019-2024

LLJ Customs Car Audio Fabrication
Original price $100.00 USD - Original price $110.00 USD
Original price
$100.00 USD - $110.00 USD
$100.00 USD - $110.00 USD
Current price $100.00 USD
Out of stock

A pickup truck amp racks is the best solution for properly and easily securing your aftermarket equipment to you vehicle. Our amp racks are de...

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GM_GMC amplifier integration FAST Harness 2014-2018

LLJ Customs Car Audio Fabrication
Original price $47.00 USD - Original price $47.00 USD
Original price
$47.00 USD
$47.00 USD - $47.00 USD
Current price $47.00 USD
In stock

Our F.A.S.T harnesses are just that a Factory Audio Signal Tap ! An economic version of our Original Elite system counterfeited by PAC audio /Sting...

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Jeep Mcintosh ANC bypass harness 2022-2025

LLJ Customs Car Audio Fabrication
Original price $7.00 USD - Original price $7.00 USD
Original price
$7.00 USD
$7.00 USD - $7.00 USD
Current price $7.00 USD
In stock

Jeep's Mcintosh amplified factory audio system includes Active Noise Cancelation, or ANC. The ANC designed to pick up on low frequency road noise ...

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Jeep RAM alpine Harman Kardon Sub T-harness 2015-2025 R2R

LLJ Customs Car Audio Fabrication
Original price $240.00 USD
Original price $240.00 USD - Original price $240.00 USD
Original price $240.00 USD
Current price $205.00 USD
$205.00 USD - $205.00 USD
Current price $205.00 USD
In stock

The Ram Jeep R2R Alpine HK T-Harness allows you to add any aftermarket subwoofer to the Ram/Jeep system in minutes. Using the Ram/Jeep T-Harness ...

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KEYLOC® Smart Line-Out Converter

kicker
Original price $129.99 USD - Original price $129.99 USD
Original price
$129.99 USD
$129.99 USD - $129.99 USD
Current price $129.99 USD
In stock

This revolutionary, DSP (digital signal processor)-controlled, line-output converter automatically detects the frequency response and phase of your...

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Kicker 47KEYLOC Smart Line Output Converter Elite 2ch T-Harness Accessory

LLJ Customs Car Audio Fabrication
Original price $195.00 USD - Original price $195.00 USD
Original price
$195.00 USD
$195.00 USD - $195.00 USD
Current price $195.00 USD
In stock

The Kicker 47KEYLOC Elite 2 Channel T-Harness is a one of a kind design ideal for installing Subwoofers to your aftermarket truck or car's factory ...

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Kicker KEY 200.4 Audio Harness F.A.S.T 5ft

LLJ Customs Car Audio Fabrication
Original price $155.00 USD - Original price $175.00 USD
Original price
$155.00 USD - $175.00 USD
$155.00 USD - $175.00 USD
Current price $155.00 USD
In stock

Our KICKER KEY Harness matched with the revolutionary smart DSP and amplifier will deliver a quick, professional-quality car audio upgrade for your...

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KICKER KEY GX200.4Pluse Elite S.I.K Audio Harness Kit

LLJ Customs Car Audio Fabrication
Original price $520.00 USD - Original price $520.00 USD
Original price
$520.00 USD
$520.00 USD - $520.00 USD
Current price $520.00 USD
In stock

At LLJ Customs we aim to make out T-Harness and Loopback Harness as multi-purpose as possible. That is why we invented the Elite Harness System. T...

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Lincoln/FORD ANC Bypass harness 2020-Up

LLJ Customs Car Audio Fabrication
Original price $15.00 USD
Original price $15.00 USD - Original price $15.00 USD
Original price $15.00 USD
Current price $10.00 USD
$10.00 USD - $10.00 USD
Current price $10.00 USD
In stock

Our Ford ANC bypass Harness is the first of its kind and is the ideal solution for disabling the factory Ford/Lincoln ANC system allowing you to ad...

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LLJ 8-32 Threaded Plastic Insert for Amp Rack

LLJ Customs Car Audio Fabrication
Original price $0.50 USD - Original price $0.50 USD
Original price
$0.50 USD
$0.50 USD - $0.50 USD
Current price $0.50 USD
Out of stock

Do it like a true PRO. We use high brass mix, high end 8-32 Threaded Plastic Inserts in our ABS amp racks since 2012. Need to service your amp or a...

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MINI Under-hood Fuse holder mounts©

LLJ Customs Car Audio Fabrication
Original price $10.00 USD - Original price $10.00 USD
Original price
$10.00 USD
$10.00 USD - $10.00 USD
Current price $10.00 USD
In stock

Our ABS ANL under-hood fuse mounts are universal in design and will come with a few guides to help you keep your fuse holder straight. The ABS unde...

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RAM Amp Rack pickups 24" driver side 2017-2023

LLJ Customs Car Audio Fabrication
Original price $125.00 USD - Original price $125.00 USD
Original price
$125.00 USD
$125.00 USD - $125.00 USD
Current price $125.00 USD
Out of stock

Our RAM pickup amplifier racks are designed to mount into place using the factory bolts, This method of securing the RAM pickup amp rack to th...

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RAM Amp Rack pickups 37" passenger side 2017-2023

LLJ Customs Car Audio Fabrication
Original price $125.00 USD - Original price $125.00 USD
Original price
$125.00 USD
$125.00 USD - $125.00 USD
Current price $125.00 USD
Out of stock

Our RAM pickup amplifier racks are designed to mount into place using the factory bolts, This method of securing the RAM pickup amp rack to th...

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RAM Amp Rack pickups 59" full back wall 2017-2023

LLJ Customs Car Audio Fabrication
Original price $175.00 USD - Original price $175.00 USD
Original price
$175.00 USD
$175.00 USD - $175.00 USD
Current price $175.00 USD
Out of stock

Our RAM vehicle amplifier racks are designed to mount into place using the factory bolts, This method of securing the RAM pickup amp rack to the b...

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RAM jeep ANC bypass harness 2018-2025

LLJ Customs Car Audio Fabrication
Original price $14.00 USD - Original price $14.00 USD
Original price
$14.00 USD
$14.00 USD - $14.00 USD
Current price $14.00 USD
In stock

The RAM jeep Active Noise Cancellation, or ANC, in your vehicle is designed to pick up on low frequency road noise and cancels out any undesirable...

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RAM Jeep Uconnect4 T-Harness 2013-2024 R2R

LLJ Customs Car Audio Fabrication
Original price $255.00 USD
Original price $255.00 USD - Original price $255.00 USD
Original price $255.00 USD
Current price $205.00 USD
$205.00 USD - $205.00 USD
Current price $205.00 USD
In stock

The Ram/Jeep R2R T-Harness allows you to add any aftermarket subwoofer to the Ram/Jeep system in minutes. Using the Ram/Jeep T-Harness with a Bas...

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Ram/jeep dash tweeter adapter 2016-2025

LLJ Customs Car Audio Fabrication
Original price $15.00 USD - Original price $15.00 USD
Original price
$15.00 USD
$15.00 USD - $15.00 USD
Current price $15.00 USD
Out of stock

Our Jeep/Ram Dash tweeter adapters give you a secure surface to mount your new aftermarket tweeter. Keep everything factory and secure with our acr...

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S.I.K: FS1000 2014-2019 GM | GMC Crew Cab

LLJ Customs Car Audio Fabrication
Original price $550.00 USD - Original price $550.00 USD
Original price
$550.00 USD
$550.00 USD - $550.00 USD
Current price $550.00 USD
Out of stock

Our S.I.K: F1000 units aim at simplifying the installation of a full system in your 2014-2018 GM/GMC truck. Our S.I.K systems are all fully p...

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Silverado pickup amp rack 2014-2019 18"

LLJ Customs Car Audio Fabrication
Original price $60.00 USD - Original price $70.00 USD
Original price
$60.00 USD - $70.00 USD
$60.00 USD - $70.00 USD
Current price $60.00 USD
In stock

The Silverado/Sierra Pick-up amp racks are not just the first of their kind ,they are also the best. Our amp racks are designed to fit into place,...

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Silverado pickup amp rack 2014-2019 28"

LLJ Customs Car Audio Fabrication
Original price $110.00 USD - Original price $125.00 USD
Original price
$110.00 USD - $125.00 USD
$110.00 USD - $125.00 USD
Current price $110.00 USD
In stock

Our Silverado/Sierra Pick-up amp racks are not just the first of their kind ,they are also the best. Our amp racks are designed to fit into place,...

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Silverado pickup amp rack 2014-2019 37"

LLJ Customs Car Audio Fabrication
Original price $135.00 USD - Original price $145.00 USD
Original price
$135.00 USD - $145.00 USD
$135.00 USD - $145.00 USD
Current price $135.00 USD
In stock

The Silverado/Sierra Pick-up amp racks are not just the first of their kind ,they are also the best. Our amp racks are designed to fit into place,...

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Silverado pickup amp rack 2014-2019 48"

LLJ Customs Car Audio Fabrication
Original price $150.00 USD - Original price $160.00 USD
Original price
$150.00 USD - $160.00 USD
$150.00 USD - $160.00 USD
Current price $150.00 USD
In stock

Our Pick-up truck amp racks are not just the first of their kind ,they are also the best. Our amp racks are designed to fit into place, mounting o...

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Silverado pickup amp rack with Bose 2014-2019 48"

LLJ Customs Car Audio Fabrication
Original price $150.00 USD - Original price $160.00 USD
Original price
$150.00 USD - $160.00 USD
$150.00 USD - $160.00 USD
Current price $150.00 USD
In stock

The Silverado/Sierra Pick-up amp racks are not just the first of their kind ,they are also the best. Our amp racks are designed to fit into plac...

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Single ANL Under-hood Fuse holder mounts© Shock-Wire

LLJ Customs Car Audio Fabrication
Original price $20.00 USD - Original price $20.00 USD
Original price
$20.00 USD
$20.00 USD - $20.00 USD
Current price $20.00 USD
In stock

Our ABS ANL Fuse Mounts are available with and without the T-Spec Fuse holders and come with hardware. If you choose no fuse holder so you can moun...

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Industry leaders or thieves?

Stolen designs

For years people like CAF and 5STAR said you HAD to pull new speaker wire, then we showed up and now they say loops are the way. Don't trust people who copy others and try to take credit.

The year was 2018

Before the solutions were even needed we had them. It wasn't until 2022 that PAC Audio and Metra would have to backstep and steal our design to stay in the game.

The SCAM that is PAC Audio

The amp-pro was PACs first try to steal our ideas. It failed so bad they had to steal our ANC bypasses to make the amp-pro (2019) work better. (pic taken 2017)

12v Knowledge block

What Is "High Level" or "Low level" ?

What Is "High Level" or "Low level" ?

High level: AKA Speaker level is an amp that can handle an input voltage of 8-40v. This high output is common in factory amplified vehicles or where the
max voltage of a head unit is more than 10v. This is normally identified by a pigtail connection point or via the RCA on the amplifier (must check user manual to verify). Some amps have a switch for this. NOT all amps have this feature.

Low Level: is 0-8v of signal voltage. This is most commonly found in aftermarket head units or other aftermarket units that use can-bus. Most passive LOC units output 0-5v, so they are considered a low level and are normally RCA to RCA. Modern day ACTIVE LOC units can output 0-10v of signal.

In conclusion an LOC works as an in-line filter that lets you control the signal, its intensity and in some cases the playable frequency range.

If your amp takes a high level and it is within the vehicles factory output range then you don't need an loc unit and can wire in and out of your amp directly. In some Fords the signal can be flattened at the OBD2, further simplifying the installation.

Wavtech Units

Automotive Amp Racks

We created the Automotive Amp Rack

We created the Automotive Amp Rack

to give customers a secure place to mount their equipment without damaging their vehicles and having the ability to build and test everything outside of the vehicle. Choosing durable materials like ABS, HDPE, Acrylic and always using factory bolts was our mission.

This product has now turned into an upsell by shops and copy-cats like 5star and car audio fabrications on YouTube to be sold as some type of beauty product. Shops are using cheap materials like expanded PVC board and charging customers a premium price for doing something they should have been doing all along. Your choices are get robbed, or screw holes and water leaks.

They do not represent what our products are and we don't appreciate the theft of our products and ideas being used to steal from customers.