Akrapovic 991.2 Turbo Exhaust: Titanium Slip-On (2016-2017)

The Akrapovic 991.2 Turbo exhaust range is the natural next step for owners of the second-generation, 3.8-liter twin-turbo flat-six. Built specifically for the 2016–2017 Porsche 911 Turbo and Turbo S (991.2 chassis), these systems pair high-grade titanium construction with handcrafted carbon-fiber detailing to shed significant weight, sharpen throttle response, and give one of the world’s great all-weather supercars a richer, more purposeful voice. At NLP Performance, we stock the full Akrapovic lineup for this exact chassis — the complete Slip-On Line, the muffler-only configuration, and both finishes of the rear carbon-fiber diffuser — so you can build precisely the package your car deserves.

What Akrapovic offers for the 991.2 Turbo and Turbo S

Akrapovic builds its 991.2 Turbo catalog around a modular philosophy: start with the Slip-On Line, then layer on the cosmetic and acoustic hardware that suits your build. For the 2016–2017 Turbo and Turbo S, that translates into four distinct parts we carry. The flagship is the Slip-On Line (Titanium) with Tips and a Gloss Diffuser — the complete, finished package. There is also the Slip-On Line (Titanium) in its base form, which is the titanium muffler section that requires the tips and diffuser to be added separately. Finally, the two Rear Carbon Fiber Diffuser options — High Gloss and Matte — let you tailor the rear-valance aesthetic to match the rest of the car.

Because this is the Slip-On Line rather than a full turbo-back Evolution or Race Line system, every option here installs in the factory exhaust’s place without an ECU remap. Akrapovic positions the Slip-On as the first stage in its tuning process: a meaningful improvement in weight, sound, and flow that preserves daily usability and the car’s OEM-grade fit and finish.

The flagship: Slip-On Line with Tips and Gloss Diffuser

The complete Slip-On Line is the system we recommend for most owners because it arrives as a coordinated set rather than a starting point. The titanium muffler section is finished with handcrafted tailpipes and matched to the high-gloss carbon-fiber rear diffuser, so the rear of the car looks fully resolved the moment installation is done. Akrapovic manufactures these systems using high-grade, heat-resistant titanium alloys, with key components cast in the company’s own in-house foundry — the same materials science and motorsport-derived processes that have made Akrapovic a benchmark in the premium exhaust world.

Titanium is the headline here for good reason. It is dramatically lighter than the stainless steel of the factory system, which directly benefits a rear-engined car’s mass distribution. The carbon-fiber diffuser carries that weight-saving theme into the bodywork while adding a genuinely exotic visual signature. Together, the tips and diffuser are what transform the Slip-On from a performance part into a finished statement.

Slip-On Line base: the titanium muffler that requires tips and diffuser

The base Slip-On Line is the same titanium muffler core, sold without the finishing tips and diffuser. The product title says it directly: Req. Tips/Diffuser. This is the configuration for the owner who already has the tailpipes and rear diffuser sorted — perhaps because they want to specify a particular diffuser finish, or because they are matching an existing carbon look on the car. Functionally it delivers the identical titanium muffler and the same acoustic and weight benefits as the complete system; it simply leaves the visible hardware for you to choose.

Choosing this route lets you pair the muffler with either of our two carbon-fiber diffusers below. Just be clear-eyed about what the title is telling you: on its own, this part is not a finished install. You will need the appropriate Akrapovic tips and a diffuser to complete the look at the rear valance.

Rear Carbon Fiber Diffusers: High Gloss and Matte

The rear diffuser is where the Akrapovic 991.2 Turbo package goes from sounding right to looking the part. Akrapovic offers two finishes for the same precision-laid carbon-fiber rear diffuser: a deep High Gloss weave and a stealthier Matte finish. Both are dimensionally identical and both integrate with the Slip-On Line tailpipes; the choice is purely aesthetic. The High Gloss diffuser is the one bundled into our flagship complete system, while the Matte version is the natural pick for owners chasing a more understated, race-inspired rear end.

These diffusers are genuine carbon fiber, not painted plastic, so they add the lightweight, motorsport-grade material story that defines the rest of the system. If you bought the base Slip-On muffler, one of these two diffusers is the companion piece that finishes the install.

Compare the Akrapovic 991.2 Turbo systems

Here is how the four parts line up side by side. The complete system is the most expensive but the only turnkey option; the base muffler plus a diffuser is the build-it-yourself route.

Weight savings and materials

Weight reduction is the most measurable benefit of the titanium Slip-On Line. On the 991.2 platform, Akrapovic’s titanium Slip-On is documented to cut exhaust mass by roughly 7.3 kg — a reduction in excess of 35 percent over the factory exhaust, and on the muffler section a saving approaching 44 percent. In a rear-engined 911, taking that much weight off the very back of the car is felt in agility and in the way the chassis settles, not just on a spec sheet.

The materials story goes deeper than the headline. Akrapovic uses heat-resistant, ultra-lightweight titanium alloys throughout, with components cast in its own foundry, and finishes the system with handcrafted titanium tailpipes and a carbon-fiber rear diffuser. That combination is what lets the system save weight, withstand turbocharger-level exhaust temperatures, and look like factory-plus hardware all at once.

Sound and performance: what to expect

Akrapovic tunes the Slip-On Line to give the turbocharged flat-six a deeper, more aggressive tone without compromising the everyday comfort that makes a 911 Turbo livable. Where the factory turbo exhaust can sound muted, the Akrapovic system unlocks a richer, more characterful note that builds with revs and load. It is purposeful rather than obnoxious — the kind of voice that suits a 500-plus-horsepower grand-touring supercar.

On the performance side, the freer-flowing titanium system reduces back pressure and improves exhaust-gas flow, which sharpens throttle response and helps the engine breathe. Akrapovic publishes verified power and torque gains for its 991-platform titanium systems, measured on its own dyno against the OEM sports exhaust. We do not quote a 991.2 Turbo-specific dyno figure here because we will not put a number on your car that we cannot stand behind for that exact variant; what is consistent across the platform is a meaningful, measurable improvement in flow and response without any need for an ECU remap.

Fitment: exact years, chassis, and variants

Every product in this article is built for the second-generation 991 (991.2) Porsche 911 Turbo and Turbo S, model years 2016–2017, powered by the 3.8-liter twin-turbocharged flat-six. Both the standard Turbo and the higher-output Turbo S share the same exhaust hardware here, so the Slip-On Line, the base muffler, and both diffusers fit either variant. These parts are specific to the 991.2 chassis — they are not interchangeable with the earlier 991.1 Turbo or the later 992 Turbo, which use different systems. As always, confirm your exact model year and chassis code before ordering, and our team in Tampa, FL is happy to verify fitment with you.

Installation and what is required

As a Slip-On system, this installs in place of the factory rear muffler section without modifying the headers or catalysts, and without an ECU remap. The single most important thing to understand before you order is the tips-and-diffuser distinction. The flagship Slip-On Line with Tips and Gloss Diffuser arrives complete — muffler, tailpipes, and high-gloss carbon diffuser together — and needs nothing else. The base Slip-On Line (Req. Tips/Diffuser) is, as its name states, the muffler core only: it requires the Akrapovic tips and one of the carbon-fiber diffusers to finish the install.

If you go the modular route, plan your full parts list before ordering: base muffler plus a High Gloss or Matte diffuser plus the correct tips. We strongly recommend professional installation on a car of this caliber to protect the titanium hardware and ensure a perfect seal at the rear valance.