Right from unboxing, these slip-ons exude quality. Crafted by hand in Italy from AISI 304 stainless steel with anodized billet aluminum end caps—and available in finishes like Chrome, Black Chrome, and Black Cerakote—they immediately elevate the bike’s aesthetic with that Italian flair and durable build
Sound & Presence
Idle rumble? Deep and refined. Add a little throttle and it blossoms into a rich, throaty roar—not so thunderous it rattles your helmet, but unmistakably commanding. They strike the perfect balance between subtle and stirring—your ride speaks before you do.

Performance & Feel
ZARD claims a modest yet satisfying bump in horsepower—+2.3 hp for the racing version and +1.2 hp for the homologated model On the road, the response feels sharper, the engine breathes freer, and cruising is smoother than ever. It's impressive how a small spec number transforms into a livelier, more alert ride.

Installation & Fit
Bolt-on simplicity. Clear, user-friendly instructions and quality hardware made the install a breeze—I had them mounted in under an hour with perfect alignment and no fuss
Final Verdict
If you're after more than just a sound upgrade—if you want performance, style, and swagger—the ZARD Slip-Ons “4.5 Inches” are a stellar upgrade. They’ve turned my ride into a smoother, more distinctive beast—one that turns heads and delivers on the road.

I’ve just fitted the ZARD Slip-Ons “4.5 Inches” exhaust to my 2023 Harley-Davidson CVO Road Glide ST, and let me tell you—it’s a game-changer. Right out of the box, the craftsmanship blew me away. The stainless steel body paired with the anodized billet aluminum slash-cut end caps screams Italian elegance, while still feeling tough enough for long rides on America’s highways
Sound & Character
Idle that beast, and you’re greeted by a deep, rumbling purr—subtle enough not to rattle your helmet, but commanding attention. Open the throttle, and it roars beautifully, with a tone that’s both aggressive and refined. It’s loud but tasteful—not your neighbor-alert kind of loud, more like “I know you’re here, and so does everyone else.”
Performance Impact
Performance gains are noticeable. The throttle snaps quicker, and the bike feels more eager to accelerate. Cruising at speed? It’s smoother, more stable, and surprisingly responsive—like the engine is finally breathing easier than ever before. The advertised power bump (+2.3 hp for the racing version, +1.2 hp for homologated) may seem modest on paper, but it translates to a perceptible liveliness on the road.
Fitment & Installation
Installation was a breeze—clean, bolt-on fit with user-friendly instructions. I had them installed and ready to ride in under an hour, with perfect alignment and zero headaches. ZARD clearly understands what riders want: a hassle-free upgrade.
Aesthetic & Build Quality
In terms of looks, the Slip-Ons give the CVO that custom, high-end flair. The finishes—whether Chrome, Black Chrome, or Black Cerakote—are immaculate and feel built to last. The bike turned heads before, and now, it practically demands a second glance.

I recently upgraded my 2022 Harley Davidson CVO Road Glide ST with the ZARD Slip-Ons "4.5 Inches" Exhaust, and I’m absolutely blown away by the results. The improvement in sound, performance, and overall ride quality is incredible.

The quality of the ZARD slip-ons is exceptional. The chrome finish is pristine, and the material feels solid and built to last. These slip-ons give my CVO Road Glide ST a bold, aggressive look that matches its high-performance capabilities. The 4.5-inch pipes strike the perfect balance—they’re large enough to give the bike a powerful presence, but not so overwhelming that they take away from the bike’s sleek design. They fit seamlessly and look fantastic.

Sound-wise, the ZARD Slip-Ons truly transform the bike. At idle, the deep rumble is music to my ears. When I twist the throttle, the exhaust roars to life with a smooth, throaty growl that feels like pure power. The tone is rich and bold, and while it's loud enough to make a statement, it’s not too obnoxious—it’s the perfect balance of raw power and refinement. It’s exactly the sound I’ve always wanted from my Road Glide.

Performance has also improved. The throttle response feels quicker, and the bike feels much more responsive at all speeds. The engine seems to breathe easier, and as a result, the power delivery is smoother and more consistent. I’ve noticed that acceleration is smoother and more immediate, especially during higher-speed cruising or when I need to quickly pass on the highway. It feels like the exhaust has unlocked a bit more of the bike’s potential.

Installation was quick and easy. The fitment was perfect, and I had the exhaust installed in less than an hour. The instructions were straightforward, and everything lined up seamlessly. ZARD made the installation process incredibly simple, which was a big plus for me.

If you’re looking to upgrade your Harley Davidson CVO Road Glide ST with a high-quality exhaust that improves both sound and performance, I highly recommend the ZARD Slip-Ons "4.5 Inches" Exhaust. It’s a premium upgrade that truly enhances the riding experience, and I couldn’t be happier with my decision.

I recently installed the ZARD Slip-Ons "4.5 Inches" Exhaust on my 2023 Harley Davidson CVO Road Glide ST, and I couldn’t be more thrilled with the results. This exhaust system has taken my bike’s sound, performance, and overall feel to the next level.

The build quality of the ZARD slip-ons is absolutely top-tier. The chrome finish is impeccable, and the material feels solid and durable. The 4.5-inch diameter gives the bike a more aggressive, custom look that enhances its premium style without overpowering its design. These slip-ons fit perfectly and complement the aggressive lines of my CVO Road Glide ST beautifully.

Sound-wise, these slip-ons deliver exactly what I was looking for. At idle, the exhaust produces a deep, rich rumble that immediately grabs attention. When I open the throttle, the exhaust roars to life with a smooth, powerful growl that is music to my ears. It’s loud enough to turn heads but not obnoxiously so—it’s the perfect balance of power and refinement. The tone is incredibly smooth, and I find myself enjoying every ride even more.

In terms of performance, I noticed an immediate difference. The throttle response is sharper, and the bike feels much more responsive, especially when accelerating or cruising at higher speeds. It feels like the engine is breathing easier, and the result is smoother power delivery and a more comfortable, confident ride. I’ve definitely noticed an improvement in overall performance, especially on long highway rides or winding backroads.

The installation was straightforward. The fitment was perfect, and I had the exhaust installed in under an hour. The instructions were clear, and everything lined up just right. ZARD made the process hassle-free, and I was back on the road enjoying the new exhaust in no time.

If you own a Harley Davidson CVO Road Glide ST and are looking to improve the sound, performance, and look of your bike, I highly recommend the ZARD Slip-Ons "4.5 Inches" Exhaust. It’s a premium upgrade that makes your bike sound and feel like it should from the factory.