Aprilia RS660 De-Cat DownPipes

Our aprilia rs660 de-cat downpipes are exactly what your RS660 needs to unlock the true performance potential hiding beneath that restrictive factory exhaust system. Designed and manufactured right here in the UK, these premium downpipes are built to exacting standards from T304 stainless steel, giving you a product that is as durable as it is effective. Whether you are chasing faster lap times, a more aggressive soundtrack, or simply want to shed unnecessary weight from your machine, these downpipes deliver on every front.

Why Choose Aprilia RS660 De-Cat Downpipes from Max Torque Cans?

At Max Torque Cans, we take pride in crafting exhaust components that are built to last and engineered to perform. Our aprilia rs660 de-cat downpipes are manufactured from T304 grade stainless steel — the same alloy used in high-end motorsport applications — ensuring outstanding resistance to heat, corrosion, and the general punishment of British roads and riding conditions. Every weld is carried out with care by experienced fabricators who understand motorcycles inside and out.

Removing the catalytic converter from your RS660 is one of the most straightforward performance upgrades you can make to the bike. The factory cat adds weight, creates a restriction in the exhaust flow, and contributes to heat build-up around the engine. By fitting a set of aprilia rs660 de-cat downpipes, you open up the exhaust path, allowing gases to exit more freely. The result is improved throttle response, a more linear powerband, and a more characterful, sporty exhaust note that truly suits the character of this brilliant twin-cylinder machine.

These pipes are a popular choice for track day enthusiasts, club racers, and road riders who want to get the very best out of their Aprilia RS660. Paired with an aftermarket slip-on or full exhaust system, the gains in performance and sound quality are immediately noticeable.

Product Features of Our Aprilia RS660 De-Cat Downpipes

• British Made: Proudly fabricated in the UK by skilled exhaust specialists with years of motorsport experience.
• T304 Stainless Steel Construction: Premium grade stainless throughout — resistant to corrosion, heat, and road grime for a long service life.
• De-Cat Design: Fully removes the factory catalytic converter to eliminate exhaust restriction and improve gas flow.
• Direct Fit for Aprilia RS660 (2020 onwards): Precision engineered to bolt directly onto your RS660 without modification.
• Improved Exhaust Note: Deeper, more aggressive tone that complements the RS660’s twin-cylinder character perfectly.
• Weight Saving: Lighter than the heavy factory unit, contributing to improved power-to-weight ratio.
• TIG Welded Joints: Clean, strong welds throughout ensure a gas-tight seal and a professional finish.

Fitment and Compatibility — Aprilia RS660 De-Cat Downpipes

These aprilia rs660 de-cat downpipes are specifically designed to fit the Aprilia RS660 from the 2020 model year onwards. The RS660 has established itself as one of the most exciting middleweights on the market, and thankfully the exhaust architecture lends itself very well to this type of upgrade. The pipes are manufactured to OEM mounting point dimensions, meaning fitment is straightforward and no drilling, cutting, or fabrication is required on your part.

Before purchasing, please confirm your model year and ensure you are purchasing the correct front pipe configuration for your specific build. If you are running the bike in a road-legal configuration, please be aware that removing the catalytic converter may affect emissions compliance and could render the vehicle non-compliant for use on public roads in certain jurisdictions. These pipes are ideal for track use and off-road/competition applications. As always, we recommend consulting with a qualified mechanic or exhaust specialist if you have any questions about legal compliance in your area.

Our aprilia rs660 de-cat downpipes pair exceptionally well with a wide variety of aftermarket cans and performance exhaust systems available here at Max Torque Cans. If you are building a full performance exhaust setup for your RS660, these downpipes are the ideal starting point.

Installation Notes for Aprilia RS660 De-Cat Downpipes

Installing a set of aprilia rs660 de-cat downpipes is a job that most mechanically competent riders can tackle at home with basic tools, though we always recommend having the work carried out by a professional if you are unsure. Here is a general overview of what the installation process involves:

• Allow the engine to cool completely before beginning any exhaust work. Exhaust components retain heat for a significant period after riding.
• Remove the factory downpipes by unbolting from the exhaust ports and decoupling from the mid-pipe or collector section.
• Inspect the exhaust port gaskets and replace if necessary — a good seal here is essential for performance and safety.
• Offer up the new de-cat downpipes and hand-tighten all bolts and fasteners before torquing down fully to avoid stress on the joints.
• Reconnect any sensors as appropriate, and consider an ECU remap or fuel tuning to take full advantage of the improved exhaust flow.
• Run the engine and check for leaks at all joints before riding.

Following installation of your aprilia rs660 de-cat downpipes, we strongly recommend booking the bike in for an ECU remap with a qualified tuner. The RS660’s engine management system can benefit enormously from being optimised to complement the freer-flowing exhaust, and a remap will unlock the full performance gains that these pipes are capable of delivering.

What You Will Receive With Your Aprilia RS660 De-Cat Downpipes

When your order arrives, you will receive a complete set of British-made T304 stainless steel front pipes, configured to fit the Aprilia RS660 2020 onwards. The pipes are supplied ready to fit and are finished to a high standard directly from our fabrication workshop. No additional hardware is included as standard, so please ensure you have the appropriate exhaust port gaskets and fasteners to hand before beginning installation.

To see detailed images of the finished product and get a clearer idea of the quality and craftsmanship involved, please view our full photo gallery on Flickr. The gallery shows the pipes from multiple angles, giving you a thorough look at the finish, weld quality, and overall construction before you buy.

If you are also looking for similar high-quality de-cat solutions for other performance bikes, take a look at our popular Triumph 765 Moto 2 De-Cat pipe — another British-made stainless steel solution crafted to the same exacting standards as our RS660 downpipes.

Frequently Asked Questions — Aprilia RS660 De-Cat Downpipes

Will the aprilia rs660 de-cat downpipes fit my 2021 or 2022 model?

Yes. Our aprilia rs660 de-cat downpipes are designed to fit the RS660 from the 2020 model year onwards, so both the 2021 and 2022 models are covered. If you have any doubt about fitment on your specific build, please get in touch with our team before ordering and we will be happy to confirm compatibility.

Do I need to remap my ECU after fitting de-cat downpipes?

While the bike will run without a remap, we strongly recommend ECU tuning following the fitment of aprilia rs660 de-cat downpipes. The improved exhaust flow changes the breathing characteristics of the engine, and a remap will allow the fuel and ignition timing to be optimised accordingly. Without a remap, you may experience lean running conditions or minor flat spots in the power delivery.

Are these downpipes road legal?

Removing the catalytic converter affects the emissions output of the vehicle and may render it non-compliant for road use under current UK and EU regulations. Our aprilia rs660 de-cat downpipes are intended for track, competition, and off-road use. It is the responsibility of the buyer to ensure compliance with all relevant local legislation before using these pipes on public roads.

What grade of stainless steel is used?

All of our aprilia rs660 de-cat downpipes are fabricated from T304 stainless steel — a premium automotive and motorsport grade alloy that offers excellent heat resistance, corrosion resistance, and long-term durability. This is the same grade of steel used across our full range of British-made exhaust components here at Max Torque Cans.

Can I use these downpipes with my existing aftermarket can?

In most cases, yes. Our aprilia rs660 de-cat downpipes are designed to work with the standard mid-pipe configuration of the RS660, meaning they should be compatible with the majority of aftermarket slip-on cans that use the standard mounting point. If you are running a full custom exhaust system with a non-standard mid-section, please get in touch and we can advise accordingly.