Valved Exhaust System for Maserati GranTurismo V8 4.2 (2008-2014)
Configuration
Maserati GranTurismo V8 4.2 Valved Exhaust System (2008-2014)
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 front pipes + 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 |
MaseratiGranTurismo / GranCabrio M145
The Maserati GranTurismo V8 4.2 exhaust in detail.
The GranTurismo 4.2 receives a 4.2-litre naturally aspirated V8 built by Ferrari: 405 hp and 460 Nm, which are not delivered all at once. You have to go and find them by climbing through the revs, where the engine reveals its temperament, and also where the factory exhaust smothers it most. Supple in town, engaging as soon as the road opens up, the Italian GT deserves better than a distant voice.
This V8 sings deep and round at idle, then sharper at the top of the rev counter, in a very Italian register. With the valves open, the Rog valved cat-back brings it out fully, especially in tunnels and out of corners; with the valves closed, the GranTurismo remains a comfortable grand tourer, able to cover mile after mile without tiring its passengers.
The page is for the 2008 to 2014 GranTurismo V8 4.2; the 4.7 and the V6 have their own, and your VIN is checked before manufacturing. Under the GranTurismo, no welding: about two hours of clamps and gaskets, then valves operated by the factory control if it exists, or by the Rog remote.
Under the “Manifold” option, the page replaces the front section that carries the V8’s catalytic converters. On a naturally aspirated engine, this part combined with an ECU remap mainly brings sharpness and a little more top-end reach, a real but modest gain; without an ECU remap, it is the V8’s song that benefits. On a GT of this size, the 200-cell version is the one that keeps emissions control, the 100-cell version will be accepted or not depending on the car and the rules in your country, and the decat version is reserved for track use, a rare destination for the 4.2. The car keeps its four round outlets, in 304 stainless steel for the V8’s warm grain or in titanium to save nearly 40% of the weight.
Maserati GranTurismo V8 4.2 exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicle | Maserati GranTurismo V8 4.2 |
| Engine | 4.2-litre naturally aspirated V8 of Ferrari origin, 405 hp and 460 Nm |
| Years | 2008-2014 |
| 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 Maserati GranTurismo V8 4.2 exhaust.
Why do the GranTurismo V8 4.2 and 4.7 have two separate pages?
Because the two engines do not take the same parts: the 4.7, like the V6, has its own page. This one follows the 4.2 from 2008 to 2014, and your Maserati’s VIN is checked before manufacturing.
What is the point of an ECU remap on the GranTurismo’s naturally aspirated 4.2 V8?
The cat-back does not call for one. With the front section, an ECU remap adds a little sharpness and top-end reach, with more limited gains than on a turbo engine: on this V8, it is the voice people come for first.
Before the vehicle inspection, should the GranTurismo V8 4.2 get its factory parts back?
Not if the front section is factory or 200-cell: close the valves, and the GT regains its grand tourer voice, catalytic converters active. A 100-cell version will be judged according to the car and your country; the decat version stays on the track.
What does the “Manifold” option replace on the GranTurismo V8 4.2?
It is the name of the option that replaces the section holding the catalytic converters, just after the V8; it mainly concerns owners planning an ECU remap, as the cat-back alone is enough to bring back the engine’s song.
Maserati GranTurismo V8 4.2: 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.
Maserati GranTurismo V8 4.2: 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
Maserati GranTurismo V8: the song of the Italian V8, the exhaust system guide
The GranTurismo is Maserati's large four-seat coupé, styled by Pininfarina to combine elegance with long-distance comfort. Under its hood, a 4.2-litre naturally aspirated V8 built by Ferrari produces 405 hp and 460 Nm, which it only delivers as it climbs...
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 Canada.
Inspections in Canada
A Rog cat-back leaves your factory catalytic converter, oxygen sensors and OBD untouched, and valves closed, your car sounds very close to stock at a safety inspection. Sport cats follow your province's rules, the catless version is for the track only, and your province decides.
On the road
Valves closed around town, your car sounds very close to stock, and you open them whenever you like.
Your documents
Each system is built from the VIN on your vehicle registration, and we send its technical documentation free on request, for an inspection or for your insurer.
Your insurance
Tell your insurer before installation: 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.
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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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