£250+ Slip-On Mufflers

A slip-on replaces the muffler at the back of the exhaust only — the header and link pipe that carry gases away from the engine are left alone. That is the appeal: a straightforward swap, not a full rebuild. This shelf is not built around one make: the biggest fitments are Kawasaki (113 live listings), Honda (94), Yamaha (59) and BMW (58), followed by Triumph, Suzuki, KTM, Ducati, Husqvarna and CFMoto, sold as Akrapovic or LeoVince kits. All 532 products here carry a fitment tag for the bike they fit — none are untagged — so the filter above is the fastest way to find yours; the rest of this page is what the filter cannot tell you.

What the words mean

• End can, or just "can" — the muffler body itself. A slip-on replaces this one part and nothing else.
• Link pipe, or mid pipe — the pipe between the engine's header and the end can. Most bikes keep their own; a few fitments need a new one to match the new can's inlet.
• dB killer, or baffle — the removable insert inside the can that reduces noise. Riders use both words for the same thing.

Named-fitment kit or universal kit

Most of this shelf is sold as a kit built for one specific bike. LeoVince, the largest single share here, describe those kits as complete — muffler, bracket and every small part needed for assembly included, nothing extra to buy. The exception, on their own account, is a universal muffler kit, sold without a manifold, which can need extra parts or adaptation to fit. Fourteen of the 532 listings here are universal rather than named to a bike; if a listing does not name your make and model, check which kind it is before you order.

Fitment — what the filter confirms, and what it cannot

Every listing is tagged to a make and model, and filtering by yours is the reliable way to find the right part. What the tag cannot confirm is the physical joint between your bike's original header and the new muffler's inlet — running changes within a model line can leave two bikes of the same year with a different bore there. One dated UK report (BikeChatForums, December 2019) described exactly that: a fitted end can chafing against the header because it was the wrong diameter, resolved with a sleeve and a high-temperature seal rather than a different muffler. If a fit does not sit clean and snug at that joint, raise it with the parts team rather than assume the wrong part was sent.

Does it need remapping?

LeoVince state, as a general rule, that their slip-ons do not need the fuel injection remapped, because the muffler is designed to work with the standard set-up — unless the fitting instructions for a specific kit say otherwise. A UK retailer selling one of the Akrapovic slip-ons on this shelf makes the same claim for that part. Treat it as the rule for a slip-on with its baffle left in place, not a guarantee for all 532 listings — check the individual product page, or ask, before you buy. It is a different question once the baffle comes out, or a full system replaces the whole exhaust; raise that with the parts team directly.

Is it road-legal, and will it pass an MOT?

This is worth getting right before anything else. UK law sets no fixed decibel limit for an MOT: testers judge by ear, checking a bike is not clearly louder than a standard example of the same model, and that the exhaust is fitted securely — an insecure system is itself a test failure. Under the Road Vehicles (Construction and Use) Regulations 1986, a silencer must not be altered so as to increase the noise it makes.

Riders commonly assume a removable dB killer is what makes an exhaust road-legal. LeoVince's own guidance says the opposite: a genuinely road-legal, type-approved exhaust has its dB killer welded in, not removable — a removable one marks a race or competition product, not a road one. Manufacturers each publish their own way of marking which specific parts are approved for road use: it is the marking on that part, not the brand, that proves it, and it is set product by product.

Our own listings do not record that marking for every product here, so we will not tell you a given slip-on is road-legal when we have not checked it. Before fitting one, look for the approval marking on the part or its paperwork, and ask the parts team to confirm it for your bike and use — a five-minute check against a failed MOT.

What is included, and what wears out later

A named-fitment slip-on normally arrives with everything needed to fit it, per the point above. Two things sit outside that box: the header joint, covered above, sometimes needs its own gasket or seal; and the sound-absorbing packing inside a conventional muffler is a wear item, not a fault — LeoVince's guidance is to replace it once the outer sleeve visibly discolours or the exhaust gets noticeably louder, both signs the packing has broken down rather than the muffler failing.

Fitting it, and where to go from here

Reports of fitting a slip-on describe the job as straightforward: off with the old can, on with the new one, using the supplied bracket and clamp. We do not have enough of our own fitting-time data to put a figure on how long it takes. If the decision in front of you is a slip-on against a complete system, that comparison sits on the wider exhausts page; for an Akrapovic part specifically, Akrapovic has its own page. Every slip-on here is for sale with free UK delivery available, and the parts team will check fitment and the legal-marking question above before you order.