As soon as I mounted the ZARD Slip-Ons “Avio” Exhaust on my 2020 Street Bob 114, I could immediately feel the upgrade in every sense. The craftsmanship is unmistakably Italian—the conical stainless steel body with visible MIG welds and sleek Avio end caps instantly elevate the bike's profile
Bonuses right out of the box? The weight savings blew me away: roughly –4 kg for the Racing version and –3.8 kg for the Euro 4/5 Homologated variant compared to the stock slip-ons. I went with the Racing version and the bike felt noticeably livelier.

Speaking of liveliness, I could sense the added +1.5 hp the Racing model claims—my Street Bob feels more eager, especially when accelerating from a stop or peeling out of corners. t’s the kind of responsiveness you don’t just read about—you actually feel it under your palms.

Now—about that sound. The Avio’s tone is deep, full-bodied, and commanding without being obnoxious. It gives the kind of throaty growl that turns heads and brings out the soul of a Harley. And despite the added bark, the bike runs cooler, which made long rides far more comfortable.

Installation was a breeze—clean bolt-on fitment that took me under an hour. No surprises, just a seamless upgrade.

In one word: transformative. The ZARD Slip-Ons “Avio” take an already great machine and make it exceptional—lighter, stronger, and vocal. If you're ready to give your Street Bob more edge, this is the exhaust that earns every bit of its price.

I couldn’t resist giving the ZARD Slip-Ons "Avio" Exhaust a try on my 2022 Street Bob 114—and wow, what a transformation. These are hand-crafted in Italy, blending striking “Avio” stainless steel end caps with expertly hand-welded flanges—pure artistry, not just parts
Fitting was a breeze thanks to the high-quality finish and attention to detail. The ceramic-coated black version stays cool even under long rides—it’s rated to withstand temperatures up to 1000 °C
But what really blew me away was the sound—bold, throaty, with a rich, deep growl that’s not obnoxious at idle but comes alive when you roll on the throttle. It strikes that perfect balance of aggressive without being overbearing.

Beyond aesthetics and acoustics, these slip-ons embody the rugged, minimalist ethos of the Street Bob—“minimal done loud” sums it up nicely

I just installed the ZARD Slip-Ons "Avio" Exhaust on my 2021 Harley Davidson Street Bob 114, and I’m absolutely thrilled with the upgrade. The transformation in both sound and performance is unbelievable.

The quality of the ZARD "Avio" Slip-Ons is top-notch. The aluminum finish looks fantastic, and the overall build feels incredibly solid. These slip-ons not only enhance the look of my Street Bob but also give it a more aggressive, custom vibe. The fitment was perfect—no issues whatsoever, and the installation process was incredibly straightforward. I had everything installed in about 45 minutes, and the instructions were clear and easy to follow.

Performance-wise, the difference is immediate. The throttle response is noticeably smoother, and the bike feels more responsive overall. I can feel the extra power, especially when accelerating. It just feels like the engine can breathe better now, and that’s made my rides much more enjoyable.

The sound is where this exhaust system truly shines. The ZARD "Avio" Slip-Ons give my bike a deep, throaty rumble that’s rich and full of character. It’s just the right amount of loud—aggressive enough to turn heads, but not so loud that it’s uncomfortable for longer rides. It adds that classic Harley growl that makes every ride feel special. I’ve already received several compliments on how great my bike sounds.

Finally, I’ve noticed a reduction in heat. The bike runs cooler, especially during long rides in warm weather, which makes a big difference in comfort.

Overall, the ZARD Slip-Ons "Avio" Exhaust is an outstanding upgrade for the Harley Davidson Street Bob 114. It improves the performance, sound, and comfort of the bike, and it looks great. If you’re considering an exhaust upgrade, I highly recommend this one. It’s worth every penny.

I recently installed the ZARD Slip-Ons "Avio" Exhaust on my 2023 Harley Davidson Street Bob 114, and I have to say, I’m incredibly impressed with the results. This exhaust system has not only enhanced the sound of my bike but has also made a noticeable improvement in performance.

The build quality of the ZARD "Avio" Slip-Ons is excellent. The aluminum finish looks sleek and modern, and the exhaust feels extremely well-built and durable. The fitment was perfect, and the installation process was straightforward. It only took me about an hour to get the system on, and the instructions were easy to follow.

Performance-wise, the ZARD "Avio" Slip-Ons made a huge difference. The bike feels more responsive, and the throttle response is smoother. There’s also a noticeable increase in power, especially during acceleration and when I need to overtake other vehicles. The bike just feels livelier, and it’s a joy to ride.

As for the sound, the ZARD Slip-Ons really stand out. They produce a deep, throaty rumble that has the perfect Harley growl. It’s aggressive, but not too loud or intrusive, which is perfect for longer rides. I love the way it sounds when I open it up on the highway—powerful and resonant. It’s exactly the sound I was hoping for, and I’ve already had several people compliment me on how great my bike sounds.

Lastly, I’ve noticed a reduction in heat. The exhaust system seems to help keep the bike cooler, which is a huge benefit, especially on hot days or during long rides. It’s much more comfortable now, and I don’t have to worry about the excessive heat from the stock pipes.

Overall, I am beyond satisfied with the ZARD Slip-Ons "Avio" Exhaust for my Harley Davidson Street Bob 114. It’s a fantastic upgrade that enhances the sound, performance, and comfort of my bike. If you're considering an exhaust upgrade, I highly recommend this one. You won’t be disappointed!