WK 50cc Colt Performance Stainless De Cat Down-Pipe Exhaust header UK Made

The wk 50cc colt performance stainless de cat down-pipe exhaust header uk made is one of the finest bolt-on upgrades you can make to your WK 50cc Colt, delivering a noticeable improvement in throttle response, gas flow, and overall rideability without compromising your bike’s fundamental reliability. Crafted right here in the United Kingdom from premium T304 stainless steel, this de-cat down-pipe header is engineered to replace the restrictive factory catalytic converter and pipework with a free-flowing alternative that lets your engine breathe the way it was always meant to. Whether you are a commuter looking for a little extra pep or an enthusiast who wants to get the very best from a small-capacity machine, this header delivers real, tangible results.

At Max Torque Cans, we take genuine pride in manufacturing performance exhausts that are built to last. The WK 50cc Colt down-pipe is no exception. Every unit leaves our workshop having been carefully fabricated, inspected, and finished to a standard that rivals — and in many cases exceeds — what you would expect from far more expensive aftermarket alternatives. When you buy British-made, you buy quality, and that philosophy sits at the very heart of everything we produce.

What Makes the WK 50cc Colt Performance Stainless De Cat Down-Pipe Exhaust Header UK Made So Effective?

The standard WK 50cc Colt down-pipe is a compromise. Like most factory pipework on small-capacity motorcycles, it is designed to meet emissions regulations and keep production costs manageable — not to maximise performance. The result is a header that restricts gas flow, adds unnecessary weight, and leaves power on the table. The wk 50cc colt performance stainless de cat down-pipe exhaust header uk made addresses every one of those shortcomings in one clean, well-engineered package.

• T304 Stainless Steel Construction: Corrosion-resistant, lightweight, and built to withstand the heat cycles that a performance exhaust endures day after day. T304 is the benchmark grade for quality motorcycle pipework, and we use nothing less.
• Ø32mm Front Pipe / Header: The bore size has been carefully selected to optimise scavenging at the rev ranges where the WK 50cc Colt engine operates most frequently, helping you extract every last drop of performance from the motor.
• Integrated O2 Sensor Port: The pipe comes complete with an O2 sensor bung, ensuring compatibility with your bike’s fuelling management and keeping things straightforward on the installation side.
• Powerbomb Baffle Included: A Powerbomb baffle is fitted as standard, producing a louder, more purposeful exhaust note that sits comfortably at the road-legal limit. You get the sound and the performance without drawing unwanted attention from the authorities.
• Fitting Bracket Included: Everything you need to mount the pipe correctly is in the box. No hunting around for additional hardware — just bolt it on and ride.
• Cat Box Removed for Better Flow: By eliminating the catalytic converter, the wk 50cc colt performance stainless de cat down-pipe exhaust header uk made dramatically reduces back-pressure, allowing spent gases to exit the engine faster and freeing up power that the standard setup simply cannot access.
• Lighter Than Standard: Less weight means better handling characteristics and a slightly improved power-to-weight ratio — every gramme counts on a 50cc machine.

Fitment Details for the WK 50cc Colt Performance Stainless De Cat Down-Pipe Exhaust Header UK Made

One of the key design priorities behind the wk 50cc colt performance stainless de cat down-pipe exhaust header uk made was that it should be a genuine direct replacement for the factory pipework — and it is. The header follows the exact same routing as the standard down-pipe, which means there is no cutting, no welding, and no fabrication required on your part. It simply drops into place where the original sat, using the standard gasket at the head and connecting directly to your existing rear silencer.

This is a particularly important point for riders who want a straightforward weekend upgrade rather than a lengthy workshop project. If you can remove the standard exhaust and fit a new one, you can fit this header. The included fitting bracket ensures the pipe is supported correctly, preventing stress on the joints during everyday use.

We strongly recommend applying a normal household silicone-based sealant to the inside of any joint before final tightening. This creates a gas-tight seal that prevents any leaks at the connections and ensures the system performs exactly as intended from the very first ride. It is a simple step that takes no more than a couple of minutes and makes a meaningful difference to long-term reliability.

Installation Notes and Practical Tips

Installing the wk 50cc colt performance stainless de cat down-pipe exhaust header uk made is a job that most mechanically minded riders can comfortably tackle at home with a basic set of tools. Here is a brief overview of what to expect during the fitting process:

• Allow the engine to cool completely before beginning any work. Stainless steel retains heat for a significant period, and working on a hot exhaust is both uncomfortable and potentially dangerous.
• Remove the standard down-pipe by unbolting the header from the cylinder head and disconnecting it from the rear silencer. Keep the standard gasket safe — you will reuse it with the new header.
• Offer up the new header and check the routing. It should follow the same path as the factory pipe without any adjustment required.
• Apply silicone sealant to the interior of the joint where the down-pipe meets the rear silencer. Allow it to sit for a moment before pushing the connection home.
• Torque all fasteners to the manufacturer’s specification and double-check everything before starting the engine.
• Run the engine for a few minutes after fitting and inspect all joints for any signs of leakage. A small amount of smoke during the first heat cycle is normal as any residual manufacturing compounds burn off.

If you are fitting this header alongside one of our rear silencers or performance cans, the pairing will deliver the best possible results. The free-flowing down-pipe and a well-matched rear can work together to maximise gas velocity throughout the entire exhaust path. If you are interested in de-cat solutions for other machines, take a look at our Aprilia RS660 De-Cat DownPipes — a similarly impressive piece of British engineering for a very different class of motorcycle.

Frequently Asked Questions About the WK 50cc Colt Performance Stainless De Cat Down-Pipe Exhaust Header UK Made

Will this down-pipe fit my WK 50cc Colt without any modifications?

Yes. The wk 50cc colt performance stainless de cat down-pipe exhaust header uk made is designed as a direct, bolt-on replacement for the standard factory header. It uses the original gasket and connects to the standard rear silencer without any cutting or fabrication.

Is the exhaust note road-legal?

Yes. Although the Powerbomb baffle produces a louder and more characterful sound than the standard set-up, the noise level remains within road-legal limits. You get the performance and the soundtrack without the risk of falling foul of noise regulations.

Do I need to re-jet or remap the bike after fitting?

For most riders on a standard WK 50cc Colt, no remapping is necessary. The inclusion of the O2 sensor port means the bike’s fuelling system can continue to operate correctly. That said, if your machine has other performance modifications, it may be worth consulting a specialist to ensure the fuelling is optimised across the board.

What is the difference between this and a standard down-pipe?

The factory header retains the catalytic converter, which restricts gas flow and adds weight. The wk 50cc colt performance stainless de cat down-pipe exhaust header uk made removes that restriction entirely, replacing it with a free-flowing T304 stainless steel pipe that improves gas flow, reduces back-pressure, and frees up additional power. It is also lighter and more durable than the standard unit thanks to the quality of materials used in its construction.

Is this made in the UK?

Absolutely. Every wk 50cc colt performance stainless de cat down-pipe exhaust header uk made is fabricated right here in Britain by the skilled team at Max Torque Cans. You are buying a genuinely British-made performance component, not an imported unit that has simply been rebranded. That matters to us, and we believe it should matter to you too.

If you are exploring de-cat solutions across a range of bikes, we also stock the BSA Gold Star de res pipe 304 Stainless Steel — another fine example of the quality British craftsmanship that Max Torque Cans is known for. Whatever you ride, we have a performance upgrade to match.