Take 10% off your next purchase Use code NS19 8/11-8/21


Products in high demand can take 10 + days to ship this time frame is subject to change. Thank you 


There's much to see here & more to come. So, take your time, look around, and learn all there is to know about us. Please reach out to us with any questions you might have,odds are we can do it or already have it. We hope you enjoy our site and take a moment to:

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Factory System Integration Kits (S.I.K)

Plug and play system integration for car audio

Why change out that expensive head unit you already own. Let S.I.K help you save time and money !

The Rattler


Ever wonder if you can do your own Subwoofer installation? Let us save you the trouble, take a look at our plug and play sub systems. Car specific for optimal P&P.


Get 5% off your first purchase when you sign up.

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Our Story


Our Mission Statement


 LLJ Customs is a family owned and operated business built to support our community of mobile audio enthusiasts and new comers! We are located in the very hot, very tornado free, sunny Phoenix, Arizona! 

  At LLJ Customs we’re not going to sell you equipment you don’t need. We are here to help you design and build your dream system from the most basic to the complex. With over 20 years of combined experience we will answer any question you may have and if we don’t know the answer we will figure it out together! We stand behind our products 120%! Everything we build is custom fitted and tested to work with your set up! 

If you do not see what you are looking for listed below, please feel free to reach out to see how LLJ Customs can be of service to you!  


Experienced Installers

The installers at our shop has over 10 years of experience in car audio and specialize in car stereo installation. They are dedicated to providing high-quality installations and mind blowing designs! As the owner and installer, I take care of every install as if it was my own. This is why we charge by the job, not hourly, and only do installations by appointment so there is no sense of rushing. 


Why LLJ Customs

What sets us apart from our competitors is not just the care that we put into our work, but the tools and materials that we use to make our work the best! 

We don't :

  • Use butt connectors, we solder all our connections.
  • Use electrical tape, we use Automotive grade Tesa Tape.
  • Use MDF to make door adapters, we use high temp ABS,PVC & Acrylic plastics. 
  • Use sheet metal screws, we use stainless steel threaded nut inserts and hardware.

What we offer

LLJ Customs offers Many more options than what is listed please feel free to reach out to us and ask how we can help with your project.

Our Policy

We pride ourselves on a prompt turn around on all of our orders. Due to the nature of the custom parts, LLJ Customs requires 2-5 business days in order to complete the manufacturing process. 

All of our adaptors are custom made to order. All sales on adaptors are final. 

Any of our electronics and harnesses have a stringent 15 day return policy. Any product that is returned, must be returned in it's original condition (no alterations, all original pieces included). Should you choose to return a product, the buyer is responsible for all costs associated with the return; including shipping and handling. Returns after 15 days will have to 50% of the orders total price as a restocking fee. There is no returns on custom harnesses or amp rack kits only the 5 year warranty.  

After an order has been placed, the buyer has up to 48 hours to notify an LLJ Customs representative of any alterations or cancellations. Any cancellations after 48 hours will be required to pay 50% of total order amount. 

If the product is damaged upon arrival, you have 24 hours to contact an LLJ representative in order to receive a replacement, for no additional charge. 

LLJ Customs is not responsible for any damage done to your vehicle due to incorrect installation of our product. Please contact us with any questions or concerns. 

Warning: Keep your eyes on the road while driving. Watching videos while the car is in motion is dangerous and in most states illegal. Illegal use of the product is prohibited. This product is meant for off-road, retail display, and show-use only. Use at your own risk! LLJ customs is not responsible for the misuse of its products.