Valved Exhaust System for Alfa Romeo Giulia Quadrifoglio 952 2.9 V6 (2016-2018)
Configuration
Alfa Romeo Giulia Quadrifoglio 952 2.9 V6 Valved Exhaust System (2016-2018)
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 Alfa Romeo Giulia Quadrifoglio 2.9 V6 exhaust in detail.
Under the bonnet of the Giulia Quadrifoglio sits a 2.9-litre twin-turbo V6 designed by engineers from Maranello, readily described as a Ferrari V8 minus two cylinders. It is rated at 510 hp and 600 Nm, and its natural voice is hoarse, almost brassy. The standard exhaust only lets part of it through: you sense the pedigree, you do not really hear it.
The Rog valved cat-back, or valve exhaust depending on the vocabulary, brings this V6 back to the fore: it rumbles at idle, howls at high revs and cracks sharply on the overrun when the valves are open. Closed again, they let the family saloon take over, at a level close to stock. Built to your VIN for the 2016 to 2018 Quadrifoglio, the system fits in about two hours, without welding, with clamps and gaskets: factory control if the car has its factory valves, the Rog remote otherwise.
After the turbos, the downpipe carries the catalytic converter: it is the second restriction after the silencer, and this page sells it under the “Manifold” option. Without an ECU remap, replacing it changes the sound and slightly lightens the whole system, without adding horsepower; with a Stage 2 tune, published figures for this V6 reach 588 hp and 735 Nm. On the Quadrifoglio, the 200-cell version keeps the factory emissions control, the 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, on a closed circuit and never on the open road. In 304 stainless steel or in titanium, around 40% lighter and offered in brushed, gold or purple, the system keeps the four round tailpipes that are the Quadrifoglio’s signature.
Alfa Romeo Giulia Quadrifoglio 2.9 V6 exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicle and chassis code | Alfa Romeo Giulia Quadrifoglio, type 952 saloon |
| Engine | 2.9-litre twin-turbo V6, 510 hp and 600 Nm |
| Years | 2016-2018 |
| 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 Giulia Quadrifoglio 2.9 V6 exhaust.
Can a 2019 or newer Giulia Quadrifoglio V6 take this exhaust?
It is designed for the 2016 to 2018 Quadrifoglio. For a more recent car, do not take it for granted: send us the VIN and we check before manufacturing. The Giulia 2.0 Turbo and the facelifted Stelvio Quadrifoglio have their own pages.
Does the Quadrifoglio’s V6 2.9 need an ECU remap to make the most of the system?
For the sound, no: the cat-back works on a factory ECU. For power, yes: it is the ECU remap, combined with the downpipe, that takes the 2.9 V6 towards the 588 hp and 735 Nm published for Stage 2.
Which configuration should be kept to present a Giulia Quadrifoglio V6 at vehicle inspection?
Closed valves and the original catalytic converter, or the 200-cell downpipe: the V6 then finds a saloon’s voice again. With the 100-cell, the outcome depends on the car and the rules in your country, and the decat version never leaves the track.
304 stainless steel or titanium: which to choose for the Giulia Quadrifoglio’s V6?
304 stainless steel gives a full sound and shrugs off winters. Titanium, around 40% lighter for the same design, brings out the V6’s metallic side at high revs and comes in brushed, gold or purple.
Alfa Romeo Giulia 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 Giulia 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 Giulia Quadrifoglio: unleashing the V6 with Ferrari blood, the complete guide
The Giulia Quadrifoglio is the favourite sports saloon of road testers worldwide: 510 hp from a V6 with Ferrari blood, and an exceptional chassis. Its factory sound, while decent, falls short of its DNA: the V6 can and should roar...
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
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.
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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.
-
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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