Exhausts Ducati Monster S2R S4R

Two cylinders, two different souls, one unmistakable design signature: the SR series represented the pinnacle of the Monster range throughout the 2000s. The Ducati Monster S2R, with its air-cooled 803 cc Desmodue V-twin featuring two valves per cylinder, was all about rideability and mid-range torque. The S4R raised the bar with the liquid-cooled 996 cc Desmoquattro four-valve engine, producing 113 horsepower and delivering a decidedly sportier temperament. Both shared the steel trellis frame, single-sided swingarm and that distinctive exhaust layout with two stacked silencers on the right side that became a hallmark of the series. A striking arrangement that still makes these Monsters instantly recognisable today. If you are looking for exhausts for Ducati, these two versions are particularly rewarding to work on when it comes to silencers, thanks to the visibility and visual impact of the dual side-mounted exit.

Roadsitalia silencers for the Monster S2R and S4R are sold as a pair and replace exclusively the two original end cans. The headers and the rest of the stock exhaust system remain in place: the upgrade only concerns the final section of the exhaust. Each pair comes complete with a fitting kit, connectors, springs, brackets and everything needed for installation on the original mounting points, with no modifications required to the frame or existing pipework. For the best results and correct tightening of all components, we recommend having the installation carried out by a qualified mechanic with Ducati experience.

The most noticeable benefit after replacing the end cans is the weight saving. The original silencers on the SR series, especially the factory catalysed versions, are quite heavy, and a pair of aftermarket silencers provides a noticeable reduction in weight high up on the bike, with tangible benefits in terms of perceived handling. The exhaust note changes distinctly: the Ducati V-twin gains a more open and defined voice, with that irregular firing pulse typical of the desmodromic V-twin becoming more pronounced both on acceleration and on the overrun. The result is a more characterful and engaging sound, without being excessive for road use.

Every exhaust is handcrafted in Lombardy, in the province of Bergamo. Each pair of silencers is built to order and quality-checked before dispatch. This means you are not buying an off-the-shelf mass-produced item, but a component built specifically for your motorcycle. Because our silencers are sold directly, with no intermediaries, we can maintain a direct relationship with every customer, from the selection process right through to after-sales support, and whoever answers you knows these exhausts inside out.

Every silencer is supplied with a standard dB killer fitted, which is required for road-legal homologation valid throughout Europe and Switzerland. The dB killer is not officially removable: its removal voids the product's homologation. For those who prefer an even quieter setup, the No-Noise version is available - a welded internal baffle that further reduces the noise level without significantly affecting engine behaviour. The No-Noise option can be selected directly on the product page.

Since only the silencers are being replaced, the motorcycle's ECU does not normally require any remapping. The engine's operating parameters remain at factory settings and no electronic issues arise from the installation.

Up-to-date production lead times are always visible during checkout. Once your order has been dispatched, you will automatically receive a tracking code to follow the delivery.

For any technical questions or compatibility queries, we invite you to check the FAQ section on our website or to contact us via the Contact page or live chat. We respond directly, with no intermediaries.

To optimise the ECU as well, our Alientech Powergate 4 remapping kit is available, with up to 4 maps included, calibrated on the bike configuration: Ducati Monster S2R 800 (2005-2007), Ducati Monster S2R 1000 (2006-2008) and Ducati Monster S4R e S4RS (2003-2008). The map also removes the MIL warning light, which can come on with the non-catalysed version.

Below you will find the product list with all the silencer pairs available for the Ducati Monster S2R and S4R. The differences between models are mainly aesthetic: body shape (oval or round), sleeve material (titanium, black titanium, carbon fibre) and overall design. The No-Noise option can be selected from the drop-down menu on each product page. Click through to the product page that interests you to view detailed photos, read the technical specifications and configure your pair of silencers.