The stock exhaust on my 2025 Aprilia Tuono V4 Factory 1100 already sounded decent, but I wanted to see what the SC-Project slip-on could do for the sound and the look of the bike. The sound took a few months to win me over.
Aprilia’s SC-Project Street Legal Slip-On Silencer, part number 2S002344, was the only slip-on I found that would keep my Tuono road-legal in the EU. I bought it. With a carbon can that looks this good on the bike, one option was enough for me.
Aprilia describes it as a titanium silencer with a carbon-fibre outer sleeve and a carbon-fibre hanger for single-seat fitment. The weight saving is 2.3 kg over the standard silencer, according to Aprilia’s accessory listing .
Fitting the slip-on and adjusting the exhaust valve
An authorised Aprilia service centre fitted the silencer in March and used Aprilia’s P.A.D.S. diagnostic tool to adjust the exhaust valve. The ECU kept its stock map, with no alternative available through the tool.
With the heat shield off, you can see where the two exhaust valve cables meet the new link pipe just below and behind the rider’s right footpeg. The carbon-fibre hanger supports the silencer from beneath the tail in my single-seat setup. I also had the passenger footpegs removed to save a little more weight and give the tail a cleaner look.
The finished setup is easiest to see from the right rear. The heat shield covers the upper section of the link pipe, and the canister follows the angle of the tail.
How it sounded after a few months
The first time I fired up the Tuono with the SC-Project fitted, it had a different note from the stock can. I was on the fence about which sounded better. A few months down the road, the V4 seemed louder and fuller, with more of that bark I love.
Maybe the sound-absorbing packing wore a little, or maybe I’m imagining the change. Either way, the V4 sounds superb to me now. It’s hard to tell from the saddle whether the slip-on adds any power, and the Tuono already has plenty. The carbon can and hanger clean up the tail, and the sound is just as much a reason to make the swap. I’d recommend this slip-on to any Tuono V4 Factory owner thinking about replacing the stock can.
Stock exhaust vs. SC-Project sound clips
I recorded the stock silencer before the swap and made two short clips with the SC-Project fitted. All three are stationary recordings from the same bike, made around the time of installation.