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 | Not separately recorded | 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 were addressed under Porsche's connecting-rod bearing campaign; individual chassis participation should be confirmed. |
| 991.2 GT3 (4.0) | 2017–2019 | Not separately recorded | 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 | Not separately recorded | 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.
| Date | Auction | Car | Mileage | Result |
|---|---|---|---|---|
| 2026-04-25 | Broad Arrow Air|Water Auction (Lot 245) | 2018 991.2 GT3 Touring | — | $293,750 Sold |
| 2025-02-22 | Iconic Auctioneers Race Retro (Lot 625) | 2014 991.1 GT3 | — | £73,125 Sold |
| 2024-02-23 | Iconic Auctioneers Race Retro (Lot 957) | 2018 991.2 GT3 Touring | — | £139,500 Sold |
| 2024-01-02 | Mecum Kissimmee (Lot K153) | 2018 991.2 GT3 | — | $206,250 Sold |
| 2023-07-06 | Mecum Summer Special (Lot S155.1) | 2019 991.2 GT3 | — | $242,000 Sold |
| 2023-03-04 | RM Sotheby's Lot 124 | 2018 991.2 GT3 Touring | — | $240,800 Sold |
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.
Our view, not advice. This section is Car Collector International's editorial judgement on where this model sits in the collector market, based on the production, specification and market data set out in this guide. It is not a recommendation to buy or sell and it is not investment advice. Values can fall as well as rise.
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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.
