Will the original valve system (Valvetronic) continue to work with a Milltek exhaust?

Yes. Milltek Sport systems are designed to integrate seamlessly with OEM electronic or vacuum-controlled exhaust valves (Active Valve Control) from brands such as Audi RS, BMW M and Volkswagen R. You control the sound via your original drive profiles in the onboard computer.

Milltek Sport Exhaust Systems: Official Dealer & Fitment

Q: What is the difference between a Milltek Cat-back and an OPF-back / GPF-back?

A Cat-back system replaces the exhaust from the catalytic converter rearwards. On modern cars (from around 2018) a petrol particulate filter (OPF/GPF) is often mandatory. A Milltek OPF-back system connects directly after this filter, keeping the car fully road legal (TÜV/EC approved) without software tuning, but with a heavier, sportier sound.

Q: Will a Milltek downpipe trigger a check engine light (CEL)?

If you choose a decat downpipe (without catalytic converter) or a high-flow sports cat downpipe, the lambda sensor will read different values. At Wheels 'N Customs we supply and fit the physical downpipe, but you will then need to have the engine software (chiptuning) handled by an external software specialist to clear the Check Engine Light (CEL) and safely make use of the extra HP.

Milltek Sport: Exhaust Systems, Downpipes & Installation

Enrich the sound and performance of your car. Wheels 'N Customs is the official dealer of Milltek Sport in the Benelux. Request a quote now and have your new exhaust system installed and aligned in-house at our Nijkerk workshop.

MILLTEK

OFFICIAL DEALER

Don’t just buy — have it guaranteed perfectly fitted

You don’t buy a Milltek exhaust every day. You’re looking for the deep, aggressive bark your car deserves. However, many online channels (or pure distributors) only deliver the box. Who fits it? How do you ensure the exhaust tips sit perfectly straight in your (new) diffuser? Wheels 'N Customs provides the complete solution. We are an authorised Milltek Sport dealer and have a physical, specialised workshop in Nijkerk. We fit the system vibration-free, align the trim pieces perfectly and can combine this directly with, for example, a Maxton Design diffuser.

1. The Milltek Sport Range at Wheels 'N Customs

Milltek Sport is a British manufacturer with more than 40 years of racing history. Made from aircraft-quality non-magnetic T304L stainless steel. Discover the systems we supply and fit:

SYSTEMS Cat-back / OPF-back

The most popular upgrade. Replaces the system from the catalytic converter (Cat) or the particulate filter (OPF/GPF) rearwards.

TÜV / EC Approved (Road-legal)
Direct sound upgrade without remapping
Resonated (with centre silencer) or Non-Resonated (louder)

PERFORMANCE Milltek Downpipes

For pure performance. Replaces the hot, restrictive section immediately after the turbo for more power and flow.

Decat (No catalytic converter, maximum sound)
High Flow Sports Cat (200 cell HJS)
Note: Software tuning (remap) required after installation!

ACCESSORIES Decorative Tips & Active Valves

Looks matter too. Milltek integrates seamlessly with your factory valves (Valvetronic) and offers numerous exhaust tips.

Cerakote Black / Polished / Titanium
Carbon Fiber tips
Integration with OEM drive modes (Audi Drive Select / BMW M)

2. Why Order & Fit at Wheels 'N Customs?

When you search Google for "Milltek Sport Nederland", you often end up with wholesalers or distributors without a consumer-focused tuning workshop. Wheels 'N Customs removes the hassle and offers you direct service:

Our Competitive Advantages	Wheels 'N Customs (Nijkerk)	Pure Distributors / Webshops
Specialised Fitting (5 days p/w)	Yes, In-House Workshop	No, outsource or just ship boxes
Alignment of Exhaust Tips	Manually, perfectly centred under the bumper	Customer/third-party responsibility
Combination with Diffusers (Maxton/Rieger)	Can be fitted in the same appointment	No, rarely offer aerodynamics
Physical Shop (6 days p/w)	Yes, coffee ready for advice	No, online email/phone contact only

3. What You Need to Know about Tuning & Exhausts (FAQ)

Where can I buy and have a Milltek Sport exhaust fitted in the Netherlands?

At Wheels 'N Customs in Nijkerk you can easily request a customised quote and we fit genuine Milltek Sport exhaust systems. Unlike regular webshops or importers that only deliver the box, our specialised workshop carries out the complete, vibration-free installation and precisely aligns the decorative tips (exhaust tips).

What is the difference between a Milltek Cat-back and an OPF-back / GPF-back?

A Cat-back system replaces the exhaust from the catalytic converter rearwards. However, on modern cars (built from around 2018) the manufacturer often fits a petrol particulate filter (OPF or GPF). A Milltek OPF-back system connects exactly after this filter. The big advantage? You keep your filter, you avoid faults, the system is TÜV/EC approved (road-legal in NL/BE) and you still get that deeper, much sportier Milltek sound.

Will a Milltek downpipe trigger a check engine light (CEL)?

Yes. If you choose a Decat downpipe (an open pipe without a catalytic converter) or a High-Flow Sports Cat downpipe, your car’s lambda sensor will measure different oxygen values compared with the standard factory catalytic converter.

Note: At Wheels 'N Customs we supply and fit the physical downpipe perfectly from a mechanical perspective. However, we do not carry out software tuning ourselves. You must have the car remapped by a software specialist elsewhere after installation to clear the Check Engine Light (CEL) and to safely use the additional power.

Will my original valve system (Valvetronic) continue to work?

Yes! Milltek Sport systems are designed to integrate seamlessly with the OEM electronic or vacuum‑controlled exhaust valves (Active Valve Control) found on brands such as the Audi RS models, BMW M series and Volkswagen Golf R / GTI. This means you can control the sound exactly as factory‑fitted via your original drive profiles in your onboard computer or steering‑wheel controls.

What is the difference between Resonated and Non‑Resonated?

A Resonated system includes a centre silencer. This dampens the ‘drone’ on the motorway, keeps the sound restrained and is often EC/TÜV approved. A Non‑Resonated system removes the centre silencer and is significantly louder and rougher, ideal for the extreme enthusiast, but often not EC‑approved for road use.

Request a Quote & Fitting Back to Knowledge Base