I recently installed the ZARD Decat Header on my 2025 Moto Guzzi Stelvio, and I can't believe the transformation. At just 2.8 kg (6.2 lbs), this stainless-steel decat cuts a solid 3.6 kg from the bike’s weight—meaning the handling feels noticeably lighter and more nimble as soon as you're standing it upright
But the real gem? The Stelvio feels more spirited and alive out on the road. That extra 4.9 horsepower isn't just a number—it’s a tangible push in the mid-range, especially when carving through the twisty mountain passes near Quito
Installation was a breeze: the decat fits seamlessly with the existing engine guard, heat shields, and center stand—no modifications needed. It was ready to ride within minutes
The sound upgrade is undeniable too—deeper, more commanding, and in perfect harmony with the Stelvio’s adventurous character. It's not overly loud—just right.

One heads-up: On my E5+ setup, the “CAT” warning light did illuminate post-install. The performance wasn’t affected, but if you want to keep the dash clean, a follow-up ECU remap may be necessary to suppress the warning

I recently installed the ZARD Decat Header on my 2024 Moto Guzzi Stelvio, and the change is astonishing—in the best way possible.

Thanks to its AISI 304 stainless steel construction, this decat shaves off a substantial 3.6 kg (7.9 lbs) compared to the stock catalytic converter, giving the Stelvio noticeably more agility and balance the moment I lifted it off the stand
The bike instantly felt less weighty yet planted—and the added 4.9 HP boost injected a subtle but satisfying spike in performance across the rev range
The install was simple—the decat is fully compatible with the engine guard, heat shields, and center stand, so it dropped right into place without any modifications
No ECU remapping was required, although I did keep an eye on the dash—those riding past EURO5 regulations might trigger the “CAT” warning light, so a remap is something to consider later
On the road, the Stelvio feels transformed: throttle response is crisper, the motor breathes more freely, and there's a throaty growl that wasn't there before. It feels more eager—especially fun when carving canyon roads or launching off the line.

Why this upgrade rocks:

Weight reduction = livelier handling.

Noticeable power gain for an OEM-friendly mod.

Seamless fitment—integrates perfectly with standard accessories.

Raw, pleasing exhaust tone without excessive drone.

Bottom line: If you're riding a Moto Guzzi Stelvio from 2024–2025, this ZARD Decat is a remarkable upgrade. It enhances handling, sharpens power delivery, and gives the bike a more aggressive voice—all with straightforward installation. A brilliant enhancement for anyone wanting more character and performance out of their Stelvio.

I recently installed the ZARD Decat on my 2024 Moto Guzzi Stelvio, and the improvement has been fantastic. From the moment I started the bike after installation, I could feel a noticeable difference in both performance and sound. The decat really unlocks the true potential of the Stelvio’s engine by removing the restrictive catalytic converter, allowing the bike to breathe much more freely.

The sound is a huge upgrade. It now has a deeper, more aggressive growl that complements the Stelvio’s rugged character perfectly. At idle, it has a smooth rumble, and as you open the throttle, it opens up with a satisfying, throaty roar. It’s louder than stock but not overpowering — just the right amount of presence for an adventure bike like the Stelvio.

Performance-wise, the bike feels much livelier. The throttle response is sharper, and the mid-range power feels significantly improved. It feels like the engine is now working more efficiently, and overall, the bike feels smoother and more responsive in all riding conditions.

Installation was straightforward. I didn’t need to remap the ECU, and everything fit perfectly with no adjustments required. It took less than an hour to install, and I immediately noticed the difference on my first ride.

If you’re looking to enhance the sound, performance, and overall experience of your Moto Guzzi Stelvio, the ZARD Decat is a must-have upgrade. It’s well-built, easy to install, and truly transforms the ride.