The generation that reinvented the GT3 — new DFI flat-six, first PDK, and — from 2017 — the return of the manual and the arrival of the Touring.
The 991 GT3 launched in 2013 with an all-new 3.8-litre naturally aspirated flat-six from Porsche's DFI 9A1 family — not the Mezger of the 996 and 997 — producing 475 PS and revving to 9,000 rpm. Transmission was seven-speed PDK only, and rear-axle steering appeared for the first time on a GT3.
The 991.2 GT3 of 2017 grew the flat-six to 4.0 litres, raised output to 500 PS and — following clear customer demand — reintroduced a six-speed manual gearbox as a no-cost option alongside PDK. The 991.2 GT3 Touring, added in 2018, offered the 4.0-litre and manual gearbox without a fixed rear wing, opening the GT3 to a quieter styling brief.
The 991 is the generation that took the GT3 into the modern DFI era, introduced PDK to the GT3 line, and — with the 991.2 — brought the manual gearbox back after buyers pushed against a PDK-only 991.1.
| Variant | Years | Production | Notes |
|---|---|---|---|
| 991.1 GT3 (3.8) | 2013–2016 | — | New DFI 9A1-family flat-six (non-Mezger), 469 bhp / 475 PS, seven-speed PDK only; first GT3 with PDK and rear-axle steering. Early cars addressed under Porsche's connecting-rod bearing campaign — verify participation. |
| 991.2 GT3 (4.0) | 2017–2019 | — | Facelift: 4.0-litre DFI flat-six, 493 bhp / 500 PS, six-speed manual reintroduced alongside PDK, revised aero and chassis; 9,000 rpm redline. |
| 991.2 GT3 Touring | 2018–2019 | — | No-cost Touring package on the 991.2: manual gearbox only at launch, deletes the fixed rear wing in favour of an active spoiler, unique interior trim. |
Start with identity, paperwork and originality. For the Porsche 911 GT3 (991), the strongest cars have a continuous Porsche or recognised GT-specialist service file, original paint, matching numbers, both keys, complete books and tools, and — where available — the Porsche Certificate of Authenticity and factory build documentation. Manual gearbox (991.2), Touring specification, sought-after collector colours, low mileage and complete Porsche or GT-specialist history.
The 9A1-family 4.0-litre is robust; a well-publicised early-991.1 3.8 connecting-rod bearing issue was addressed by Porsche under a factory campaign and participation should be verified on any 991.1 candidate. PDK service, PCCB wear and rear-axle steering condition are the ongoing variables. A proper pre-purchase inspection includes a full PIWIS diagnostic scan, cold-start behaviour, borescope of the cylinder bores where age or history justify it, compression and leak-down testing where appropriate, an undertray-off inspection of the flat-six and gearbox, chassis and suspension survey, brake condition (including PCCB weight/thickness measurement where fitted) and a long enough road test to expose heat-related faults. Deferred maintenance on a GT-department car is almost always more expensive than buying a better-sorted example.
The GT3 is a track-capable car and a meaningful proportion have been used on circuit. Track use is not itself a problem — it must simply be documented and reflected in the price. Use a paint-depth gauge, a lift inspection and a specialist familiar with the model's factory panel gaps. Inspect splitter, diffuser, undertrays and roll-cage mounts for evidence of contact; confirm any PPF history; and price concealed accident or fire damage severely.
991.2 GT3 with the six-speed manual, and the 991.2 GT3 Touring, lead the market. 991.1 PDK cars are the value entry point within the generation; sought-after collector colours and complete Porsche history are the differentiators. Specification, colour, Clubsport / Touring / Weissach option packs and factory build documentation move values significantly. Buy the best-documented example in the most desirable specification you can justify rather than a tired car of a rarer derivative that will need years of corrective work.
Regional ranges authored independently — each reflects its local market, not an FX conversion
Each region quoted in its local currency — independent market readings, not FX conversions
The 991 GT3 market is tiered clearly by phase and gearbox. Aggregate data puts a base 991.2 manual at roughly $200,000 on average, with 991.1 PDK cars sitting below that and 991.2 manual Touring cars leading; the naturally aspirated 4.0-litre and the return of the manual on the 991.2 are the durable value drivers. An occasional very-low-mileage or special-provenance 991.2 Touring result well above $1,000,000 is treated as an outlier rather than a market benchmark.
| Date | Auction | Car | Mileage | Result |
|---|---|---|---|---|
| 2025-11-01 | Aggregate-tracked Aggregate-sourced recorded sale | 2018 991.2 GT3 Touring (6-spd manual) Aggregate-sourced recorded sale figure, not an individually verified auction-house lot; Touring / manual cars command the current premium. | — | $435,000 Sold |
| 2026-02-01 | Aggregate-tracked Aggregate-sourced recorded sale | 2018 991.2 GT3 (base, 6-spd manual) Aggregate-sourced recorded sale figure, not an individually verified auction-house lot; representative of base 991.2 manual trading. | — | $300,888 Sold |
Figures above are aggregate-sourced recorded sales rather than individually confirmed auction-house lots; treat them as directional benchmarks. Manual and Touring cars lead the market, while PDK 991.1 cars sit below; occasional very-high results on special-provenance Touring cars are treated as outliers and are not published here as benchmarks.
As the last non-hybrid GT3 with an internal-combustion powertrain matures toward closure, the 991.2 4.0-litre — particularly in manual and Touring specification — is increasingly priced as a modern-classic RS alternative. Continued firming is likely on original-specification cars with complete history.
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The valuation figures in this guide are for research purposes only and do not constitute financial or investment advice. See our full disclaimer.
