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LethalPerformance

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Hey All!

We just got done installing the Kooks Street Series Axle Back Exhaust for the 2021 and UP Ford Bronco's on our 2.7L First Edition 4dr!



Kook's has done excellent job designing this system with the Bronco owner in mind, supplying of course everything you would need to install, as well as a custom exhaust hanger to counter the differences between the 2.3L and the 2.7L models.

Kooks also makes an "Adventure Series" Axle Back, which is recommended for those looking for a system that is more hidden and discrete, as well as allows for higher surface clearance, the Adventure Series would be recommended instead. While the sound should be fairly similar, there will be slight acoustic changes considering the different routing of piping to make it a single exit system.

Overall, this system give a subtle, deep-toned note, which brings out the best in the Bronco, but still is very discrete until under throttle. With the black, ceramic coated tips, it blends quite well with the rear bumper and provides an aesthetic upgrade to the rear of the truck.

This system is one of the systems closer to the OEM sound, but still is amplified compared to the OEM sound. It's perfect for someone who wants 1 step up from the OEM sound and look.

Have questions or want to get something on order? Feel free to reach out to me or any one of us on here, shoot us a call at 561-753-8105, or shoot us an email at support@lethalperformance .



Joe Rocchio / [email protected]
877-2-LETHAL | lethalperformance.com
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That sounds awful. I couldn't handle that drone.
Not sure why you think there's drone as there is no drone whatsoever. I've been driving the truck with the Kooks system on it since we installed it both locally and on road trips. Zero drone.
 

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That thing sounds HORRIBLE !
To each their own. That's what's great about our industry. There's so many different options for exhaust which all have different tones to them. My fave so far is still the AWE. Both with the tips or just the one with the bash guard.

Let us know if there's anything we can help you with.

Thanks!
 

ryn0s3r1

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Sounds great! Thanks for sharing.
 
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Will the adventure series fit 2 door ?
Indeed it will. The Kooks axlebacks work on 2 & 4 door Broncos. Let us know if you have any other questions.

Thanks!
 
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Good attempt, but, so far, nobody has made the 2.7L Ecoboost sound good. Not many V6 engines sound good, so it's a difficult task.
 

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Good attempt, but, so far, nobody has made the 2.7L Ecoboost sound good. Not many V6 engines sound good, so it's a difficult task.
This was the 8th system we installed and reviewed. There have been a few that sounded really good. I definitely agree that it’s tough making a 4 or 6cyl ecoboost sound good but some of the kits we tested actually sound really nice.
 

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One of the better sounding Bronco exhausts I've heard.

That said, NONE of them sound good because these Ford 4/6 cylinders all sound bad.
 

rayhil67

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This was the 8th system we installed and reviewed. There have been a few that sounded really good. I definitely agree that it’s tough making a 4 or 6cyl ecoboost sound good but some of the kits we tested actually sound really nice.
So how about a top 5 list of your opinion based on sound, performance, and price. This was a upgrade i was planning on doing this winter
 

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Sounds good to me from the video. As already noted 6 cylinders typically do not sound good. They can be raspy, drone or both. I had a 2016 Camaro V6 that I tried two systems- an MBRP and a custom set up at a local muffler shop. Both had drone and were raspy. The original system had practically no sound at all and was equally as bad the other way. I id not want to spend the money on a Borla (in hindsight I should have). Typically you get what you pay for in exhausts. It takes time and engineering to dial in a good sound with muffler, size, chambers, etc.
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