Models · Porsche
Porsche 911 GT3 997 buying guide
The 997 GT3 and GT3 RS ran from 2006 to 2011 with the naturally aspirated Mezger flat six, a six-speed manual and rear-wheel drive. The 997.2 brought a 3.8, centre-lock wheels and stability control, and the run ended with the 4.0 litre GT3 RS 4.0.
The versions
- 997.1 GT3 and GT3 RS (from 2006): 3.6 flat six, 415PS
- 997.2 GT3 (from 2009): 3.8, 435PS, centre-lock wheels, stability control added
- 997.2 GT3 RS: 3.8, 450PS, lightweight single-mass flywheel, shorter gearing
- GT3 RS 4.0 (2011): 4.0, 500PS, 600 built
- Six-speed manual only, rear-wheel drive; carbon ceramic brakes optional; front axle lift optional on the 997.2
What to check on a 997 GT3
3 model-specific things to look at when you view one. They're a starting point, not the full inspection.
Coolant pipe fittings
What to look for: Ask whether the engine's coolant pipe fittings have been pinned or welded, and look for the invoice. Check the coolant level and look under the back of the car for coolant residue.
Why it matters: The tubes that carry the coolant hoses were bonded into the engine's coolant housings with epoxy, which can degrade, so the lines leak or fail at the fittings. Track use makes it more likely. Securing them needs the engine out, so paperwork showing it's done is a real plus.
Over-rev record
What to look for: Ask for a diagnostic readout from a Porsche centre or specialist, or have one done as part of an inspection. It shows engine over-rev events in ranges.
Why it matters: A missed gearchange on a manual can over-rev the engine, and the engine computer logs it. The readout shows how the car has been driven, though it isn't a full test of engine health on its own.
Cracked brake discs
What to look for: Look at each steel disc face with a torch for fine cracks running from the drilled holes. Ask about track use. On carbon ceramic discs, ask when they were last assessed.
Why it matters: Heavily tracked steel discs can crack, and a disc with a crack longer than about 5mm should be replaced. Some early cars on steel discs could have the discs come loose, which Porsche fixed on later cars. Carbon ceramics don't crack like steel but don't always last long with hard track use.
Also in the full guide
- The front axle lift and nose
- Front suspension noises
- Clutch and the limited-slip differential
- Air conditioning condensers
- The cold start, test drive and paperwork checks for the exact version you're viewing
The full guide to the 997 GT3
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
Porsche 911 GT3 991 · Porsche 911 GT3 992 · Porsche 911 GT3 996
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.