Valved Exhaust System for Alfa Romeo Stelvio Quadrifoglio 949 2.9 V6 facelift (2023+)
Configuration
Alfa Romeo Stelvio Quadrifoglio 949 2.9 V6 facelift Valved Exhaust System (2023+)
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 facelifted Alfa Romeo Stelvio Quadrifoglio 2.9 V6 exhaust in detail.
Since its 2023 facelift, the Stelvio Quadrifoglio has kept the 2.9-litre twin-turbo V6 born of Maranello’s expertise, raised to 520 hp and 600 Nm. This is the model this page covers: the 2016 to 2018 Giulia Quadrifoglio has its own, as does the Stelvio 2.0 Turbo. Your SUV’s VIN lets us check compatibility of the facelifted Stelvio before starting manufacturing.
An SUV with more than 500 hp that stays discreet: that is the effect of the standard exhaust, which holds back most of this V6’s hoarse, brassy grain. With the valved Rog cat-back and the valves open, the engine rumbles, climbs with a howl and punctuates lift-offs with crisp bangs. With the valves closed, it becomes a family vehicle again, as close as possible to its original sound.
No welding is needed: clamps, gaskets and about two hours on a lift. The factory valve control is retained if the Stelvio has one, otherwise the Rog remote takes over. As the “Manifold” option, the page offers the downpipe, which carries the catalytic converter: on its own it adds no horsepower, just sound and a little weight saving, whereas with an ECU remap the published Stage 2 figures reach 588 hp and 735 Nm. On this facelifted SUV, emissions control stays active with the 200-cell version, a 100-cell will be accepted or not depending on the vehicle and your country’s rules, and the decat version is reserved for track use, far from family journeys. Titanium or 304 stainless steel: the former weighs around 40% less and comes in brushed, gold or purple, around four round tailpipes.
Alfa Romeo Stelvio Quadrifoglio 2.9 V6 exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicle and chassis code | Alfa Romeo Stelvio Quadrifoglio facelift, type 949 SUV |
| Engine | 2.9-litre twin-turbo V6, 520 hp and 600 Nm |
| Years | Since 2023 (facelift) |
| 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 (“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 Alfa Romeo Stelvio Quadrifoglio 2.9 V6 exhaust.
Is a Stelvio Quadrifoglio V6 from before the 2023 facelift compatible?
This page is for the facelifted Stelvio Quadrifoglio, from 2023 onwards. For an earlier version, we cannot confirm that the system is identical: send us your VIN and we will check before any manufacturing.
Does the Stelvio Quadrifoglio’s V6 2.9 need an ECU remap?
Not for the cat-back: the V6 keeps its map and its 520 hp. To go further, the downpipe followed by an ECU remap at an approved tuner opens the way to the 588 hp and 735 Nm published for Stage 2.
What should I plan for at vehicle inspection with a modified Stelvio Quadrifoglio V6?
Closed valves, first of all: the SUV returns to a volume close to stock. A 200-cell downpipe, like the original part, keeps the catalytic converter active. The 100-cell is judged according to the car and the country; the decat variant belongs on the track only.
How are the valves controlled on the Stelvio Quadrifoglio 2.9 V6?
If the SUV has factory valves, its drive modes stay in charge, with no added electronics. Otherwise, choose the Rog remote: a discreet box in the boot, two buttons, and opening is decided at any time.
Alfa Romeo Stelvio Quadrifoglio 2.9 V6: 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.
Alfa Romeo Stelvio Quadrifoglio 2.9 V6: 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
Alfa Romeo Stelvio Quadrifoglio: unleashing the Ferrari-blooded V6, the complete guide
The Stelvio Quadrifoglio is the most radical SUV in its class: the Ferrari-derived twin-turbo V6 in a family package. The perfect split personality, provided it has the soundtrack: that is exactly what our exhaust system brings, adjustable with the valves....
In detail
Rog Advisor
A question about this exhaust?
Fitment, sound, catalyst, valves, delivery: the answer comes straight away, with your configuration in context.
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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.
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Manufacture
Crafted with precision.
Tube bending, part fitting and TIG welding: every joint receives the same care.
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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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