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Subimods V4 Hella Horn Harness Kit Most Subaru Models



Subimods V4 Hella Horn Harness Kit - 4 is the new 2 


Many customers do not realize that when you purchase a set of Hella Supertone Horns you will only receive a relay and some brief instructions on how the horns should be connected, some customers aren’t fully equipped to handle such a task others just don’t have the time to deal with making their own Wiring Harness from scratch.


When brainstorming a new feature set for a new Hella wiring harness our team began by improving the components used, a new relay and socket design allowed us to streamline assembly and allow us to provide customers with a limited lifetime warranty on the harness entirely! That's right if you are the original purchaser Subimods will refurbish or replace your wiring harness should any defect arise during the period you own the product. Other build quality improvements were added to this harness such as a revised split loom to better withstand the elements and an upgraded fuse holder. The biggest feature came to us after we were discussing a way to give customers who purchased a two-horn setup credit towards a four-horn setup should they wish to convert. Our lead engineer almost burst out "make them all four-horn harnesses!" and that was how the idea was born. Now "4 is the new 2" if you want to just use two leads, go right ahead the harness will work exactly the same as our old gen HV2 but say you want to unleash the power of the quad horns on the road (down the road or out of the gate) just connect up the two extra sets of leads to another horn kit and boom! The best part is that we preserved our HV2 pricing on this new V4 revision so you aren't paying a cent more for this amazing new design! 


Subimods believes in the term American Made! All of our products are manufactured right here in the good 'ol USA many of them coming right from our CT location. You can guarantee that when you buy a Subimods product it will be of the highest quality!  




  • Four sets of horn leads for multiple configurations
  • Waterproof Hella Relay / Socket
  • High-quality heat shrink connectors
  • High-quality inline fuse holder with a standard 20amp fuse included
  • Fully sealed nylon braided exterior
  • Simple Plug and Play Solution!


  • Most Pre-2002 Models
  • 2002-2014 Impreza / WRX / STI
  • 2002-2016 Forester (Including Sub Models)
  • 2002-2018 Legacy (Including Sub Models)
  • 2002-2018 Outback (Including Sub Models)
  • 2013-2018 Crosstrek
Fitment Notes:
  • This product is designed to be universal and should work with all Subaru models except those listed below
  • On the 2011-2014 Impreza N/A models you must connect the trigger wire to the factory horn located under the passenger side headlight.
  • This product will not fit on the 2015 WRX/STI Chassis due to a redesigned stock horn connector. (Please see our 2015+ listing)
  • This product will not fit on the BRZ/FRS Chassis due to to a redesigned stock horn connector (Please see our 2015+ listing)


Watch as Nick takes you through the installation of our Subimods Hella Harness 



  1. Does what it's supposed to do Review by Miketv21

    I purchased this harness after I failed to do the cabling myself and now I know I should have just bought it from the beginning LOL. Worked perfectly, over a year after the install and I've had no issues with it. (Posted on 5/30/2018)

  2. It uhhh works Review by Mokie

    Like other reviews, it's easy! The only issue I had with this is the price - who the heck pays $50 for some wires, right?

    Well, 25% off sale happened, so I paid $30 for "some wires". When I received the package, I was taken aback at how well the whole harness is put together. Everything is professionally done, and very sturdy. I spent more time with the bumper than I did plugging the harness in. SO EASY and worth every penny. The waterproofed relay to the exact lengths of the wires, everything is meticulously planned and executed. Highly recommend, even for a scrooge like me. (Posted on 3/2/2018)

  3. Don't even bother with a DIY harness! Review by Alfred

    Buying this made the install incredibly painless. Don't bother with a DIY harness/soldering when this exists! The whole install took about an hour including the bumper removal, and that was honestly the most time consuming part. This will make your life 100x easier. (Posted on 10/8/2017)

  4. 2007 Legacy Spec.b Review by sanchitosonria

    Super easy and clean installation. Quality was very visible and would highly recommend. (Posted on 5/31/2017)

  5. Clean install Review by Di

    I ordered this to replace the used harness I bought off a forum member. I have sharptones and noticed that they wouldn't play the lower tone (which is why I bought them in the first place). I figured out that the old harness probably went bad and bought this one. Install is very straightforward and its design makes it look very clean. (Posted on 1/25/2017)

  6. Made install quick and easy! Review by Derrick

    I will start off by saying that as far as functionality, this gets 5 stars. I am anal, so I typically reserve 5 stars for perfection, and this had some minor issues that keep it from being perfect.
    On my application, 05 Outback XT, some wiring got a little tight, while other had excess. I know this is a universal harness, and while the above mentioned issues didn't hinder the install, it wasn't perfect for my application. Also, since it is universal, it does not come with step by step instructions. None of this actually matters to me, but it may to some.
    The harness appears to be well made. Connections were tight, and the protective wrap looks very professional and well done.
    Overall, this harness is very nice, and I would purchase it again in a heartbeat. This will make your install super quick and easy, and it will look professionally done. Don't hesitate to purchase this. You won't regret it! (Posted on 1/5/2017)

  7. A must-have Review by Anthony

    If you're getting a set of Hella horns, save yourself a LOT of time and effort. This harness makes the install extremely easy. It is well worth the price.
    (Posted on 12/14/2016)

  8. Awesome Review by Aaron

    I ordered this because my current harness was crap and this harness was very easily installed and made my horns sounds amazing.

    Thank you (Posted on 10/17/2016)

  9. Glad they figured it out for me Review by Adam

    Hooked up some Hella Sharptones to my 2015 Impreza with this harness in less time than it takes to take off the bumper cover. On my N/A Impreza, the trigger was on the horn under the passenger headlight. Harness was definitely long enough, and horns work perfectly. A word of advice, don't unhook the stock horn that is in the middle of the bumper. I did and it threw the CEL on and the outside temp gauge stopped working. Plugged it back in and everything is fine. I don't know if they are like this with every 2015 Subaru, but it was with mine....Great product, SubiMods. Thank you! (Posted on 6/24/2016)

  10. Awesome Quality! Review by Nathan

    Living in Wisconsin means a lot of wet weather. My original harness (relay) kept of shorting out (due to my install). The new relay is weatherproof, and is a higher quality in every aspect. Now my horns work amazing. I would recommend this to anyone that has a V1 harness. Completely plug and play. Install took maybe 20 minutes. Great job Subimods!! (Posted on 3/15/2016)

  11. helped me out! Review by Beo

    Bought my horns off amazon and didnt realzie you needed a harnes. Finally after some searching found that subimods had a plug and play kit and ordered. Everything was recieved quickly and install was a breeze. They also offer different color horns ;( should have noticied before I went to amazon. (Posted on 11/3/2015)

  12. 5 Stars Review by Scott S

    Easy to install, superior quality and affordable.. WIN WIN WIN, I'm telling you it would cost you much more to make this harness yourself. I looked up the relay combo and alone thats like 20 + shipping. Subimods didn't cut any corners, I also like that they kept manufacturing in the US, says a lot about the company. (Posted on 10/30/2015)

  13. simply amazing Review by John

    Let everyone said I was amazed at the build quantities of this harness. Everything here is simply plug and play. Worth every penny! (Posted on 10/10/2015)

  14. Plug and play installation Review by Justin

    Super easy install. Highly recommended. (Posted on 6/19/2015)

  15. To easy Review by Rafael Loren

    Simply put this make install to easy. Only took me and my boy 30 minutes to install everything makes the horns SUPER loud too. (Posted on 6/17/2015)

  16. Plug in and go Review by Seth

    This horn takes very little time to install thanks to subimods harness and bracket. Highly recommend! (Posted on 6/9/2015)

  17. Too easy Review by Tommy Hillrom

    The Subimods harness kit makes it to easy to install the hella's. I used to have my horns hooked up to the factory trigger wire but then I realized they didn't sound as loud as my brothers who had the Subimods kit. Low and behold after installation of my subimods harness the horns are louder then ever. Love the new design as well, yes its a bit pricey but once you get in your hands you can see why. Top notch quality for sure. (Posted on 6/5/2015)

  18. 100% Grade A++ Review by Dallas

    This product was once good, but now with a upgraded waterproof braided cable and relay, it has gotten even better! Sevenfold! You should really want and install this one of a kind v2 harness on your car. It truly makes the difference between modding your car and SubiModding your car. The integrity and thought put into this really makes this a product line you can trust, I bought and installed this on my '14 STI after having relay issues (water corrosion damage) easy simple plug and play installation - about 15 minutes start to finish. (Posted on 5/24/2015)

  19. V2 Wiring Harness Review by James

    Excellent quality that makes the horn installation a breeze. Those who are doing this the first time should know that it would be wise to seal the "activator" connection (the wire going from the original horn that connects to the wiring harness) with electrical tape or some other sealant tape to prevent moisture, corrosion, etc.. (Posted on 5/22/2015)

  20. Awesome! Review by John Q

    Easy install A+ quality overall. The waterproof relay gives me piece of mind that I'll be able to scare unruly drivers for a long time! (Posted on 5/11/2015)

  21. Made install so easy Review by Jesse

    With this harness it was almost to easy. I recommend it to any one who isn't the best with wiring like myself. Grade A quality as well! (Posted on 4/17/2015)

  22. Don't Cheap out! Review by Mike

    I made the mistake of purchasing what I thought was a wiring harness from another local vendor (JNA) there description was very vauge and I thought I was getting a great deal... fast forward to when I opened the box all I received was a bag of wire, some basic crimp on connectors and heatshrink. Finally just bit the bullet and bought the Subimods piece and man is it great, awesome quality install took me 20 minutes once I had the bumper off. Moral of the story, sometimes the cheapest is always the right choice. (Posted on 4/16/2015)

  23. great product Review by steve

    this made my install so much easier. Enough harness to do the job. Just plug in and you are ready to go! (Posted on 4/14/2015)

  24. So easy! Review by Walt

    Everyone installing supertones should purchase this harness. It honestly took me 10 minutes to connect my horns as opposed to spending an hour to make a somewhat similar harness to the subimods piece. (Posted on 11/14/2014)

  25. Idiot Proof Install Review by Chris

    This harness is a must for those not looking at wasting time building their own harness. Even better for those that get easily confused with (+) and (-) wires. Ha, cheap enough to make it a worth while purchase. (Posted on 7/24/2014)

  26. Convenience is worth the cost! Review by Travis

    Subimods puts together a high quality wiring harness that will save you time and headaches. Sure, most of the people visiting this website could probably put this together themselves, but for the quality and price, why waste your own time? This was actually a replacement for the original harness I bought from Subimods and they've certainly improved their product over the last couple years. Thanks! (Posted on 6/1/2014)

  27. Easy install Review by Erik

    Makes install quick and painless. The harness is top notch in quality and saves you the time of going out and getting all the pieces needed to assemble one like it. (Posted on 5/24/2014)

  28. Easy to install and saves a lot of time Review by Elvin

    I bought this harness since I dont have the time or resources to build my own at the moment. It was well worth it and made installation a breeze. Great quality. (Posted on 1/29/2014)

  29. Simple, yet quality is still there Review by Noximus

    I usually build my own harness', but this one is just your best bang for the buck. I couldn't have built it myself for this price for the time I would have had to put to make it. It's sealed, the connections are tight, and no cheap wire was used. Get it, you won't regret it! (Posted on 1/20/2014)

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Additional Information

Manufacturer Subimods
Warranty Subimods 100% Satisfaction Guarantee
Color Black
Plug and Play Yes
Wiring Required Not Included

Disclaimer provides fitment information provided to us by the manufacturer.  However, please make sure the product you are purchasing will fit your year, make, & model Subaru.  For example, one product may fit only a 2002-2004 WRX, but also fits a 2005-2007 STI.  This same product may not fit a 2005-2007 WRX.  Either way, the product will list the fitment years as follows: 2002, 2003, 2004, 2005, 2006, 2007.   So please be sure the product will fit your specific application.  The majority of the products listed on our site will have the year, make, & model fitment information directly in the product title. will not be held liable for purchases made for the incorrect application, and a restocking fee may be required.  If you have any questions, PLEASE contact us before making your purchase.  Our knowledgeable staff will be happy to assist you!  

Subimods V4 Hella Horn Harness Kit Most Subaru Models

29 Review(s)



special price $53.23

We are proud to release our new V4 Wiring Harness. This newly released harness keeps our 100% plug and play nature while adding extra leads for the additional horns! FOUR IS THE NEW TWO

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