Over 427,000 harnesses made & sold
Over 397,000 harnesses made & sold
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 👽
One of a kind solutions that work 100% of the time.
Add a subwoofer in minutes, keep all your factory features
Solutions that work so well, companies like PAC Audio & METRA Elec. steal them to make their harnesses work.
Created to protect your vehicle from holes, screws and simplify your installation. NOT just for "CLEAN looks".
If you need a high-quality 2-channel LOC, but don’t require additional features like summing or auxiliary inputs, the link2 is the perfect solution...
View full detailsLOC/Line Driver with Parametric EQ How do you replace the best multifunction LOC and line driver on the market? That was the question our product ...
View full details6-Channel LOC w/Summing and Remote When upgrading your audio system in a typical front, rear and subwoofer set-up, the link6 is the perfect tool fo...
View full detailsRemote Level Control The linkRC is the add-on remote level control (RLC) for the linkDQ. It is also a replacement for some legacy models (see belo...
View full detailsBass Restoration Processor Features 2CH Bass Restoration Processor Complete Tuning Control (Effect, Width, Freq) Variable Subsonic Filter ...
View full detailsThe Wavtech ART is the best and most reliable 12v audio trigger on the market. With a 1.5 amp load capability you can use it to turn on a couple of...
View full details4-Channel LOC w/Summing and Remote When it comes to adding an amplifier or amplifiers to your factory audio system, the link4 does what models from...
View full detailsThe link300.4mini is in a class by itself. The most obvious thing is its extremely small size, but don’t Iet that fool you. Unlike most small footp...
View full detailsIn-Line Parallel Load All Wāvtech models have built-in loading, but in some cases a little more resistance is required. The linkLD is an in-line pa...
View full detailsInspired by the 72-4573 adapter harness our GM/GMC speaker adapter harness makes installing aftermarket speakers easy at an appropriate price. This...
View full detailsInspired by the 72-4572 door speaker harness our GM/GMC speaker adapter harness makes installing aftermarket speakers easy at an appropriate price....
View full detailsInspired by the 72-4574 adapter harness our GM/GMC tweeter adapter harness makes installing aftermarket dash speakers easy at an appropriate price....
View full detailsInspired by the 72-8603 adapter harness, our tesla speaker adapter harness makes installing aftermarket dash speakers easy at an appropriate price....
View full detailsInspired by the 72-4568 adapter harness our GM/GMC speaker adapter harness makes installing aftermarket speakers easy at an appropriate price. This...
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No more awkward in-vehicle installations. Build it on the bench and drop it in. RELIABILITY
Created and designed to prevent screw holes and vehicle damage from "professional" installers. DURABILITY
Security is a priority & one of the many benefits our Automotive Amp Racks provide. Created by us with you in mind.
We Use Specs not brand names to build our products. We pride our designs in being the best, not just in quality but price and longevity.
Our Bose amplifier harness is designed to work with a variety of GM/Cadillac vehicles from a Silverado, Escalade, Sierra and any GM vehicle with...
View full detailsOur 8" screen GM/GMC harness is designed to work with a variety of vehicles from a Silverado, Sierra, Suburban and any other GM vehicles that use ...
View full detailsThe Bose amplifier harness is designed to work with a variety of GM/Cadillac/GMC and Buick vehicles from a Silverado, Escalade, Sierra and any G...
View full detailsOur 2019-2025 GM/GMC/Cadillac Aqua & Tan Elite Harness has been tested, redesigned and modified to what it is now by our team at LLJ Customs....
View full detailsOur 2019-2022 GM/GMC Black & Gary connector Elite Harness has been tested, redesigned and modified to what it is now by our team at LLJ Customs...
View full detailsOur versatile RAM JEEP Uconnect4 Elite Base Connector is compatible with a range of RAM JEEP vehicles including the RAM pickup, wrangler sport, Ra...
View full detailsOur versatile Ford Sync3 Elite Base Connector is compatible with a range of Ford Sync3 vehicles including the F150, Mustang, Explorer, and more ...
View full detailsOur versatile Ford Elite Base Connector is compatible with a range of Ford vehicles including the F250,F350, Mustang, Explorer, and more without...
View full detailsOur 7" Chevy harness is designed to work with GM/GMC vehicles like a Traverse with a 7" screen or a Silverado with the Work Truck, Elevation or C...
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Thank you for a quality product! Before I researched putting in an amp and two 12' subs. I took my truck to a authorized Kicker dealer and told them what I wanted. The dealer absolutely hacked my system! It sounded like total shit. They told me it is what it is... Low and behold by the random chance I found a LLJ video about installing an amp andRead more about review stating Perfect
sub with the T harness...I've worked in the elevator trade for 30 yrs and I have extensive knowledge of control wiring. I was absolutely shocked they did such a horrible installation.
Thank you for your product after a year of trying to correct the problem and it took very little time!!
Lee F.
Hooked it up when I got it just to make sure it works. Ran it for a month on a sundown 1000w.amp, rms 1400 with a 15-in woofer and it beat the block up. Setting car alarms off, exactly what I wanted. Good looking out Llj customs.
Tisha G.
The Bose amp t harness was the perfect product to get a remote wire and rcas in my 2016 Chevrolet 2500hd. No wires running to the front of the cab clean installation. Plug and play is the perfect statement when referring to this product. Great job on the design and build. A+ in my book
Logan R.
ANC bypass dos the job, without all the bs.
Bobby L.
Installed in my 2018 Tahoe Premier RST after adding 2 12in kickers I had the most annoying hum in the speakers, this fixed it! Now it sounds wonderful! If you're Adding subs to your GM vehicle that has the Bose system with ANC I highly recommend this harness Best 20 bucks I ever spent!
David C.
Product worked just as it should.
Scott R.
Need a t-harness for a GM BOSE amplifier. Search "Bose T-harness".
