Valved Exhaust System for BMW M235i N55 F22 / F23 3.0T (2014-2016)
Configuration
BMW M235i F22 / F23 Valved Exhaust System (2014-2016)
Valves
Operated by remote control, factory-paired.
Estimated at 0.50 m from the outlet, 45°, 2,000 rpm with a warm engine. Allow ± 2 dB depending on the engine and measuring point. A 3 dB difference is audible in a direct comparison; 10 dB sounds roughly twice as loud.
Configuration guide
Sound intensity with the valves open, on a scale of 0 to 10.
| Configuration | Intensity |
|---|---|
| Decat downpipe + Rog cat-back | 10/10 |
| 100-cell sports catalytic converter + Rog cat-back | 9/10 |
| 200-cell sports catalytic converter + Rog cat-back | 8/10 |
| Rog cat-back only, factory catalytic converter retained | 7/10 |
| Factory exhaust, for comparison | 3/10 |
The BMW M235i F22 / F23 exhaust in detail.
The M235i started the line of M Performance coupés, with a chassis that won over the press from launch. It receives the N55, a 3.0-liter single-turbo inline-six: 326 hp and 450 Nm, for the 2014 to 2016 model years. Ten years on, it has become an enthusiast’s buy. The M240i that succeeded it with the B58 has its own page, as does the M2 N55.
Deep and mechanical, the N55 has a thicker voice than the six-cylinders that replaced it, and it is precisely this tone that the factory exhaust holds back. Rid of its superfluous filters, it gains a strong presence from idle and a gravelly climb. With our valved cat-back, the weekend road is driven with the valves open, and the Monday morning commute with the valves closed, in a discreet M235i.
Your exhaust is manufactured to the VIN, then fitted without welding or cutting using clamps and gaskets, in about two hours. For control, the M235i keeps its original logic if it has factory valves; otherwise, the Rog remote opens and closes them at the press of a button.
Under the “Manifold” option, the page sells the downpipe that starts at the turbo and carries the catalytic converter; it is with an ECU remap that it really changes the game, on its own it only affects voice and weight. If your M235i must keep controlling emissions, go for 200 cells; the 100-cell version, for its part, is accepted or not depending on the car and the rules in your country, and the decat version is reserved for track use. 304 stainless steel underlines the single-turbo’s deep grain, while titanium, around 40% lighter, comes in brushed, gold or purple to sign off the coupé’s rear.
BMW M235i F22 / F23 3.0T exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicles and chassis codes | BMW M235i F22 coupé and F23 convertible |
| Engine | N55, 3.0-liter turbocharged inline-six, 326 hp and 450 Nm |
| Years | 2014-2016 |
| Materials and finishes | 304 stainless steel or titanium; titanium in brushed, gold or purple |
| Valves | Factory valve control if the car has it, otherwise the Rog remote |
| Front section (option) | Downpipe with 200-cell or 100-cell catalytic converter, or decat |
| Fitting | Clamps and gaskets, no welding, about 2 hours |
| Manufacturing and delivery | Made to order, 20 working days, free delivery |
| Warranty | 3 years, parts and workmanship |
Questions about the BMW M235i F22 / F23 3.0T exhaust.
Coupé or convertible: which M235i does this system fit?
Both. The F22 coupé and the F23 convertible, sold from 2015 to 2016, take the same Rog system, with the same N55 and the same clamp-and-gasket fitting. Your VIN is only used to confirm the model year before manufacturing.
What figures does an M235i reach when remapped with the downpipe?
The published Stage 2 figures for the 326 hp M235i are 410 hp and 600 Nm, achieved with the downpipe and a map from an approved tuner; the cat-back alone requires no ECU remap.
BMW M235i N55 3.0T with a Rog exhaust: what should you know about vehicle inspection?
With the cat-back only or the 200-cell sports catalytic converter, emissions control is retained: present the car with the valves closed. The 100-cell brings more sound and flow, and whether it is accepted at the emissions test depends on the car and local rules; the decat version is intended for track use.
Four exits on an M235i: does the diffuser need changing?
The system provides four tailpipes, which require a matching rear diffuser; we check this point with you and your VIN before starting manufacturing.
Does the M235i’s N55 sound better in stainless steel or titanium?
304 stainless steel showcases its deep, round tone; titanium, around 40% lighter for the same design, brings a more metallic note at high revs and three finishes to choose from.
BMW M235i F22 / F23 3.0T: Does a valved exhaust system drone?
No. With the valves closed, the gases flow through the whole rear muffler and the cabin stays calm at a steady speed. Our Rog exhausts are designed to avoid drone. Learn more: Why our systems stay calm on the highway.
BMW M235i F22 / F23 3.0T: straight pipe or resonator?
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. Learn more: Exhaust resonator: what does it do? Straight pipe or resonator, which sound to choose.
Rog expert guide
BMW M235i F22 / F23 F22: waking up the N55, the complete exhaust system guide
The M235i launched the line of M Performance coupés, with the single-turbo N55 and a chassis that won over the press straight away. Ten years on, it is an excellent enthusiast's buy. The N55 has an endearing deep, mechanical voice...
In detail
Rog Advisor
A question about this exhaust?
Fitment, sound, catalyst, valves, delivery: the answer comes straight away, with your configuration in context.
The Rog Advisor is an automated assistant trained on our product pages and answers. For an important decision, write to us: we confirm by e-mail.
Unsure about your configuration? Talk to us before you order. We know your car. Write to us at contact@rogmotorsport.com: we reply in writing, in English, within 24 hours. Email us
Your country
Rog in the US.
State inspections and your exhaust
A Rog cat-back leaves your factory catalytic converters, oxygen sensors and OBD untouched, and valves closed, your car sounds very close to stock at inspection. Sport cats follow your state's rules, the catless version is for the track only, and your state decides.
On the road
Valves closed around town, your car sounds very close to stock, and you open them whenever you choose.
Your documents
Each system is built from your VIN, and we send its technical documentation free on request, for your state's inspection or for your insurer.
Your insurance
Some insurers ask you to declare aftermarket parts, so let yours know: our free technical documentation makes it easy.
Reviews imported from our previous system and translated from French; verified purchases carry the badge.
Rog presentation film: choosing your vehicle, Standard or Equal Length design, stainless steel or titanium, Z-Pipe, controlled valves, titanium and tip finishes, and support from choosing your configuration through to shipping.
THE Rog CRAFT
Our process.
From the first bend to the last check. The same care at every step.
-
Design
Designed for your vehicle.
Geometry matched to your model, carefully studied bends and precise mounting points. Everything starts with accurate design.
-
Manufacture
Crafted with precision.
Tube bending, part fitting and TIG welding: every joint receives the same care.
-
Finishing
Material, elevated.
The finish reveals the character of the metal. Stainless steel or titanium, depending on the options available for your vehicle.
-
Assembly
Every part in its place.
Components are assembled and adjusted. On valved systems, the mechanism is fitted, set up and tested.
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Inspection
Check. Then approve.
Geometry, welds, connections and gas flow: the key points are inspected before shipping.
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Shipping
Ready to join you.
Reinforced packaging protects your exhaust in transit. The final step before giving your vehicle a new voice.
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