Akrapovič Slip-On Line, titanium – Porsche 911 Carrera / S / 4 / 4S / GTS / Cabriolet (991)
Akrapovič develops materials, construction and sound as one complete exhaust system. Its development work refines both gas flow and acoustics, with demanding cast components produced in the in-house foundry. Futurez has proudly served as an Akrapovič importer for more than a decade.
Heat-resistant titanium alloy with pre-silencers, main silencers and connecting pipes. Stock electronics control the valves in the standard package. Carrera/Carrera 4 3.4 require the original Porsche sport exhaust and do not fit non-sport cars. Approval does not remain valid with Sound Kit.
Package contents and choices
Manufacturer product code: S-PO991SO-HT/1.
- S-PO991SO-HT/1 — fitment: 911 Carrera /S/4/4S/GTS (991) 2012–2015 / 911 Carrera Cabriolet /S/4/4S/GTS (991) 2012–2015
The selected mandatory Akrapovič parts are included in the package price. Any other accessories and original Porsche parts described as separately required are not included.
Fitment and approval
- Porsche 911 Carrera /S/4/4S/GTS (991) 2012–2015
- Porsche 911 Carrera Cabriolet /S/4/4S/GTS (991) 2012–2015
EC approval applies to the specified model and manufacturer configuration. Check the exclusions above.
Manufacturer measurements
| Maximum power gain | up to 13.2 kW / 18 HP (m) @ 4050 rpm |
|---|---|
| Maximum torque gain | up to 35 Nm @ 4000 rpm |
| Manufacturer net weight | 19.8 kg |
| Weight reduction | 8.8 kg |
| Weight reduction | 30.8 % |
| Installation time | 300 min |
Figures are maximum gains at the stated engine speeds, not differences between peak output figures. Performance gains refer to the complete configuration described above and depend on the vehicle.
Optional Sound Kit
P-HF874 enables remote selection of exhaust-valve modes. Choose a package with or without it. The selected kit is included in the variant price. Approval exclusions are described above.

The manufacturer lists an iOS/Android app for this kit.
Installation and setup
We recommend installation by an authorised Akrapovič dealer. Suitable test equipment and software help verify exhaust operation, valve control and any required ECU settings after installation.
We offer professional installation at our ECU Helsinki Customs workshop in Vantaa, Finland.
More information on Akrapovič’s website
Search for manufacturer code S-PO991SO-HT/1. Product pages provide documents and available exhaust sound samples.
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