Models · Porsche
Porsche 911 GT2 RS 991 buying guide
The 991 GT2 RS, built from 2017 to 2019, has a twin-turbo 3.8 flat six with 700PS, a seven-speed PDK and rear-wheel drive. Around 1,000 were planned, and specialists have found no evidence of common faults, so most checks are about condition and use.
The versions
- 3.8 twin-turbo flat six, 700PS, with water injection
- 7-speed PDK dual-clutch only, rear-wheel drive
- Carbon ceramic brakes as standard
- Optional Weissach package: carbon fibre and titanium parts and magnesium centre-lock wheels, about 30kg lighter
- Coupé only; front axle lift was an option
What to check on a 991 GT2 RS
3 model-specific things to look at when you view one. They're a starting point, not the full inspection.
Carbon ceramic brakes
What to look for: The carbon ceramic discs are standard. Look at each disc face and edge with a torch for chips, cracks running from the drilled holes, or a heavily pitted surface. Ask about track use and when the discs were last assessed.
Why it matters: Carbon ceramic discs last a long time on the road but wear faster with hard track use. A specialist inspection with a recorded result is the way to know how much life is left, and replacement discs are a major expense.
The water injection tank
What to look for: Ask the seller to show you the carbon fibre tank for the water injection system and confirm it's topped up with distilled water. On the drive, watch the instruments for any warning.
Why it matters: The GT2 RS was the first 911 with water injection, which keeps the engine's charge air cool at high load. A seller who knows how to look after it is a good sign, and any warning should be explained before buying.
The nose, splitter and front axle lift
What to look for: Kneel at the front and look under the front splitter and bumper for scrapes, cracks and missing fixings. If the car has the front axle lift option, raise and lower the nose a few times.
Why it matters: The splitter, taken from the GT3 Cup race car, sits very low. Light scrapes are common and usually cosmetic; cracked mounts or a replaced splitter can point to a harder impact, so ask what happened.
Also in the full guide
- Weissach wheels and carbon parts
- The cold start, test drive and paperwork checks for the exact version you're viewing
The full guide to the 991 GT2 RS
The CrankSight guide walks you round the car on your phone at the viewing, with every check for the exact version you're looking at: what to look for, where to find it, and what anything you find is likely to cost. As you go it builds an assessment of that car, and if you view more than one, it lines them up side by side.
£29 for the model, used on as many cars as you like, delivered within 72 hours or your money back.
Other generations
General points for the model, last checked October 2026. Every car is different, so treat this as a guide to what to look at, not a verdict on any car. CrankSight is independent and has no connection with Porsche.