BMW X4 M40i F26: the N55 in full voice, the exhaust system guide
The X4 M40i F26 is the sharpest version of BMW's coupé SUV, with the N55, a 3.0-litre turbocharged inline-six delivering 360 hp and 465 Nm. Yet beneath that dynamic silhouette, the factory exhaust reduces the engine's voice to very little. Option by option, this guide shows you how to configure the Rog exhaust so that what you hear finally lives up to the spec sheet.
Your valved exhaust for BMW X4 M40i F26 is configured from your VIN, and the BMW X4 F26 Valved Exhaust page brings together every system we make for this generation.
Valved Exhaust System for BMW X4 M40i F26 3.0T (2016-2018)From 2 490 € · free delivery · 20 working days
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Your Rog exhaust for the BMW X4 M40i F26
Price shown on the product page, in your currency
Configure my exhaustThe short answer.
- Vehicles
- BMW X4 M40i F26 3.0T (2016-2018)
- Engine
- N55 · 360 hp · 465 Nm
- Exhaust
- Valved cat-back, built for your VIN
- Material
- 304 stainless steel or titanium
- Front section
- Optional: catted downpipe with 200 or 100 cells, or decat
- Valves
- Rog remote, or factory control if your vehicle has it
- Lead time
- 20 working days from order confirmation to delivery
- Warranty
- 3 years, parts and workmanship
Closely related versions have their own guide: BMW X4 F26 3.0T, BMW X3 M40i G01 3.0T, BMW X4 G02 2.0T.
The N55: the turbocharged inline-six at the top of the X4 F26 range
The N55 is a 3.0-litre inline-six boosted by a single twin-scroll turbo, with direct injection and Valvetronic valve control. In the X4 M40i it reaches 360 hp and 465 Nm, sent to all four wheels through the xDrive system. The straight-six brings what BMWs do best: linear thrust, great smoothness and a real eagerness to climb through the revs.
On this engine, the exhaust makes the difference between a six-cylinder that is merely effective and one you enjoy listening to. The X4 M40i's factory exhaust favours neutrality. The Rog valved exhaust lets the N55 express its natural sound, full and gruff, and lets you return to silence at the press of a button.
What makes up the exhaust on your BMW X4 M40i F26
An exhaust system is best understood in two parts. Here is what each one does, and what Rog replaces.
The cat-back is the complete exhaust system
It is everything you can see under the chassis of your BMW X4 M40i F26, from the outlet of the front section to the tips: pipes, silencer, valves. This is the part where most of our research and development goes: it is what shapes the sound, and it is enough on its own to transform the car.
The front section, where the catalytic converter sits
On your BMW X4 M40i F26, that is the downpipe, the pipe leading from the turbo. It contains the factory catalytic converter: the second restriction in the exhaust, after the silencer. Replacing it is optional: it frees up the flow, and it is the ECU remap that turns that into horsepower.
The figures for your BMW X4 M40i F26
An exhaust system is judged first by ear and on the scales. The extra horsepower comes from an ECU remap.
Power
Torque
Published factory and Stage 2 figures.
The Rog exhaust works with or without an ECU remap. To get the full potential out of your BMW X4 M40i F26, we advise taking it to an approved tuning centre for a remap afterwards.
The N55 has a reputation for responding well to an ECU remap: its turbo leaves reserves that a well-executed Stage 2 exploits, especially on torque. It all depends on the condition of the engine and on the professionalism of the tuner. The Rog exhaust completes that work on the exhaust side.
Configuring your exhaust, step by step
4 choices, in the same order as the product page configurator.
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Step 1 of 4: Material: stainless steel or titanium
Titanium costs more than stainless steel; the price of each version is shown on the product page, in your currency.
304 stainless steel
- Weight
- Baseline
- Sound
- Full and rounded
The safe bet: strong, corrosion-proof, with a full, rounded sound. The best value for money.
Titanium
- Weight
- Around 40% lighter
- Sound
- Metallic, crystal-clear
It makes the exhaust around 40% lighter for the same design. Its note is more metallic and clearer higher up the rev range, and its finish ranges from brushed to blued.
No worries on durability: 304 stainless steel shrugs off winter road salt and titanium does not rust. Stainless steel or titanium: what really changes.
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Step 2 of 4: Front section: downpipe and catalytic converter
Optional: the downpipe on your BMW X4 M40i F26, with its catalytic converter. Each option is placed on our sound scale of 0 to 10, valves open, with the factory exhaust at 3.
Cat-back only
Included
7/10Factory emissions control
The factory front section stays in place. It is already a complete transformation, and the choice of many of our customers.
200-cell sports catalytic converter
8/10Road use and inspection
More flow, emissions control retained: the right option for road use.
100-cell sports catalytic converter
9/10Inspection: depends on local rules
More open than the 200-cell: the sound hardens at high revs and emissions control is reduced.
Decat
10/10Track use
Flow with no filter at all: the rawest sound and the sharpest response.
Sound intensity, on a scale of 0 to 10
- 10/10Decat downpipe + Rog cat-back
- 9/10100-cell sports catalytic converter + Rog cat-back
- 8/10200-cell sports catalytic converter + Rog cat-back
- 7/10Rog cat-back only, factory catalytic converter retained
- 3/10Factory exhaust, for comparison
Valves open. With the valves closed, every configuration becomes discreet again.
What about the engine warning light? With a sports cat, it can come on with some engines: the sensor placed after the catalytic converter measures a different level of emissions control from the original. It is not a mechanical failure, but a warning light should never be masked or cleared without dealing with its cause: the right answer is a catalytic converter suited to the engine, with a map by a tuner who takes it into account. The decat version, for track use only, almost always triggers it. If this happens to you, write to us and we will point you in the right direction. Passing vehicle inspection with a sports exhaust.
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Step 3 of 4: Valves: Rog remote or factory control
Two ways to control the valves on your BMW X4 M40i F26.
Rog remote
A discreet control unit in the boot and a two-button remote: you open and close whenever you like, independently of the drive modes. For fitting, we support you by email.
Factory control
- Only for vehicles fitted with factory valves
- Controlled by the drive modes
For vehicles fitted with factory valves: the exhaust connects to their control and the drive modes stay in charge, with no extra control unit.
At 130 km/h, many sports exhausts drone. Here, with the valves closed, the exhaust flows through the silencer and stays composed when cruising; open, it makes itself heard when you choose. More about exhaust drone.
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Step 4 of 4: Tips: the visual signature
Match the tips to the style of your BMW X4 M40i F26, understated or bold. A particular finish in mind? Send us a photo and we will look at it together.
- Chrome
- Gloss black
- Blued titanium
- M Performance Carbon Black
- M Performance Carbon Titanium
- M Performance Carbon Forged
Your choices carry over to the product page: only the finishes, your VIN and the cart remain.
The Rog sound signature on the X4 M40i's N55
The inline-six has a voice few layouts can match: even and silky at idle, then increasingly gruff as it approaches the red line. On the standard X4 M40i, this progression stays in the background, and the coupé SUV seems tamer than it really is.
On this model, two characters at the same price: the straight pipe for the raw sound of your engine, unfiltered, or the resonator for a rounder and slightly softer voice. Either way, the exhaust stays fully sporty.
With the valves open, the Rog exhaust puts the N55 centre stage: the bass takes shape, the climb through the revs can be heard all the way up, and gearshifts gain presence. With the valves closed, the X4 returns to a calmer sound, suited to everyday journeys as well as long distances.
From order to fitting
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Configuration
You configure the exhaust and enter the VIN from box E of your registration document or from the base of the windscreen.
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Check
Your VIN is checked before any manufacturing begins.
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Manufacturing
The exhaust is produced to order, for your vehicle.
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Delivery
Free, insured parcel, tracking number from dispatch.
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Fitting
Around two hours in the workshop, with no welding or cutting.
20 working days from order confirmation to delivery
- Warranty
- 3 years, parts and workmanship, from the date of purchase
- Payment
- Card, PayPal or bank transfer
- Installation
- At the garage of your choice
Is your BMW X4 M40i F26 still under the manufacturer's warranty? In Europe, the manufacturer cannot refuse it simply because a part from another brand has been fitted: it is up to them to prove that the fault stems from it. Our article on the manufacturer's warranty.
Our recommendations for your BMW X4 M40i F26
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Daily driving
- Stainless
- Cat-back only
- Rog remote
Your BMW X4 M40i F26 stays easy to live with, the factory emissions control is retained, and you open the valves whenever you choose.
View this configuration -
Fast road
- Titanium
- 200-cell downpipe
- ECU remap
The best of both worlds: character and breathing, with emissions control retained.
View this configuration -
Track
- Titanium
- Decat downpipe
- Stage 2
The most extreme configuration, for track use only.
View this configuration
Every BMW X4 M40i F26 has its own history and use: if none of these profiles sounds like you, let's talk it over.
BMW X4 M40i F26: your questions
How much power does an exhaust system add to the BMW X4 M40i F26?
From the factory, the BMW X4 M40i F26 produces 360 hp and 465 Nm. The exhaust alone acts first on sound, breathing and weight; the extra horsepower comes from an ECU remap. With a Stage 2 build, the published figures reach 440 hp and 630 Nm.
Stainless steel or titanium: which material for the BMW X4 M40i F26?
The Rog exhaust comes in stainless steel and titanium, at the price shown on the product page in your currency. Stainless steel is the safe bet, with a full sound; titanium makes the exhaust around 40% lighter and gives a more metallic note higher up the rev range.
Do you need to replace the catalytic converter on the BMW X4 M40i F26?
It is not compulsory. The cat-back alone is enough to change the character of the BMW X4 M40i F26. Replacing the downpipe is how you go further, together with an ECU remap: 200 cells for the road, 100 cells or decat for more radical use.
Will a Rog exhaust pass vehicle inspection on the BMW X4 M40i F26?
The cat-back only and the 200-cell converter both retain emissions control: present the BMW X4 M40i F26 with the valves closed. With the 100-cell, acceptance at the emissions test depends on the car and local rules; the decat is intended for track use.
How is the Rog exhaust fitted to the BMW X4 M40i F26?
With clamps and gaskets, no welding or cutting: around two hours in the workshop for a well-equipped mechanic. The exhaust is built to the VIN of your BMW X4 M40i F26.
What does a Rog exhaust for the BMW X4 M40i F26 cost, and how long does it take?
The price depends on the configuration and is shown on the product page, in your currency. Allow 20 working days from order confirmation to delivery. Delivery is free and the exhaust comes with a 3-year warranty.
Valved Exhaust System for BMW X4 M40i F26 3.0T (2016-2018)
From 2 490 € · 3-year warranty
Configure my exhaustUnsure about your configuration? Write to us.
Between stainless steel and titanium, between the cat-back only and the full system, the right choice depends on how you drive and on your BMW X4 M40i F26. We take the time to talk it through before you order, with a reply within 24 hours. We are not here to push a sale: we help you choose, even if that means a cheaper option because it suits the way you drive. Write to us: we reply in writing, in English.
Rog is a French brand, and the way we work comes down to one idea: an exhaust system should be sold with advice, not just a product page. More than 500 exhaust systems fitted and a rating of 4.9 out of 5.
Further reading
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