Valved Exhaust System for Subaru WRX VB 2.4 Turbo (2022+)
Configuration
Subaru WRX VB 2.4 Turbo Valved Exhaust System (2022+)
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 Subaru WRX VB 2.4 Turbo exhaust in detail.
With the WRX VB, built since 2022, the turbocharged flat-four grows to 2.4 litres: 275 hp and 350 Nm, more generous torque, and still that syncopated beat that made Subaru’s rally cars a legend. Yet recent factory exhausts have smoothed out that character, to the point of making the VB almost mute.
Many owners want the boxer rumble back, and that is exactly what the Rog valved cat-back does: a deep, syncopated beat at idle, a gravelly charge and crackles on the overrun, with the valves open. With the valves closed, calm returns for the commute to the office. The page is for the VB 2.4; the Impreza STI GD and the WRX VA have their own, and your VIN is checked before manufacturing.
Under the VB, about two hours of workshop time is enough, no welding, with clamps and gaskets; the valves keep the factory control if there is one, otherwise the Rog remote takes over.
The “Manifold” option on this page replaces the front part that carries the catalytic converter, just after the engine. Fitted on its own, it affects sound and weight; combined with an ECU remap, it unlocks more power, to an extent that only the overall setup determines. For a WRX that also does the weekday commute, the 200-cell front part keeps emissions control, the 100-cell will be accepted or not depending on the car and the rules in your country, and the decat version is reserved for track use, for VBs entered in track sessions. At the rear, the VB’s four black round tips stay true to the original style, with 304 stainless steel or titanium, around 40% lighter, changing only the weight and the tone.
Subaru WRX VB 2.4 Turbo exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicle and chassis code | Subaru WRX, VB generation |
| Engine | 2.4-litre turbo flat-four, 275 hp and 350 Nm |
| Years | 2022+ |
| 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) | Front section with 200-cell or 100-cell catalytic converter, or decat (“Manifold” option on this page) |
| 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 Subaru WRX VB 2.4 Turbo exhaust.
Moving from a WRX VA to a VB 2.4: can you keep the same system?
No: the VB 2.4, built since 2022, receives different parts from the VA, which has its own page, and your Subaru’s VIN is checked before every build.
Does the WRX VB’s 2.4 boxer need a new map after fitting?
Not to enjoy the sound, since the cat-back works with the factory ECU; for power, however, you need the front part and an ECU remap, and the gain depends on the setup.
Vehicle inspection in a WRX VB 2.4: what really matters?
Closed valves and an original or 200-cell front part, for active emissions control and a voice close to stock. A 100-cell will be judged case by case according to the car and the country, and a decat VB belongs on the track only.
Does the boxer rumble really come back on the WRX VB with the cat-back alone?
Largely, yes: the cat-back removes the factory exhaust’s filter and lets the boxer’s beat express itself with the valves open. The front part is only useful for those tuning the engine.
Subaru WRX VB 2.4 Turbo: Does a valved exhaust system drone?
No. With the valves closed, the gases flow through the whole rear silencer 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 motorway.
Subaru WRX VB 2.4 Turbo: 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
Subaru WRX VB 2022+ exhaust: the voice of the turbo boxer, the complete guide
The new-generation WRX remains the rally saloon par excellence, and the voice of its boxer engine is as much a part of its heritage as gold and blue. The factory exhaust smoothed it over: our exhaust system brings back its...
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 Australia.
Valved exhausts and Australian checks
For a pink slip, roadworthy or safety certificate, the inspector checks the exhaust for leaks and secure mounting: a Rog system bolts onto the original mounting points. The cat-back keeps your factory cat, sports cats follow your state's rules, catless is track only, and your state decides.
On the road
Around town, valves closed keep your car very close to stock, and you open them whenever you like, on an open road or at the track.
Your documents
Each system is built from the VIN on your rego papers, and we send its technical documentation free on request, for your registration authority or your insurer.
Your insurance
Many policies treat an exhaust change as a modification to declare, so let your insurer 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.
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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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