Enjoyed a run in this sweet used Porsche 997 GT2 for sale earlier this week: a 2008 registered/2009 model year car with the full Manthey M600 power upgrade and some other fun bits. The car arrived for sale and was sold soon after to a keen driver and regular customer. Small wonder when it is such a special machine.

JZM is the UK Manthey agent and built this car from new for the original owner. The factory spec is comprehensive enough, but this GT2 also runs: M600 engine upgrade, Manthey MM1 magnesium wheels, KW HLS2 nose lift system and Nürburgring-approved Manthey carbon bits including front spoiler, front arch Gurneys, sill trims and rear wing extension.

Inside it has even more carbon with PCM3, black leather sports seats and Schroth harnesses as well as the normal seatbelts. Upgrades to the six-speed manual transmission include a Manthey short shift and gearbox overhaul with a few tweaks at Frikadelli Racing. Manthey replaced the upgraded 890 Nm clutch in April of this year. It shifts like a dream, and needs that upgraded clutch pack.

Standard power in a GT2 is 530 bhp, but only a stone cold example holds on to those horses. As heat increases so power is lost, with the plastic-capped intercoolers soaking up heat and frying intake temps. Manthey solves the problem with bigger all-aluminium intercoolers, also adding adding 200-cell cats and an all-new Akrapovic silencer.

As intake temperatures are now much lower, and the gases can exit the car freely, Olaf’s boys remap the better-breathing GT2 on their 850 bhp Maha dyno, taking power to a dependable 600 horsepower (hence the M600).

On the road, the car is a pussycat. JZM’s Steve McHale took us up the nearby A41 for a few miles, exploiting gaps in the traffic to best advantage. An older Porsche with this much power on a wet greasy road would be a proper handful, but even when the traction light flashed at 5,000 revs in fourth gear, the car never deviated from the straightest of lines.

Noise is my only complaint about modern 911s. They all make a stunning amount of noise through those massive rear tyres, and the M600 GT2 is no exception. Trying to make a hands-free phone call on a grainy road surface like this English dual carriageway would be somewhat frustrating, but talking on the move is no problem.

All too soon, our twenty mile spin is over. The car gets a clean bill of health and I tick another 911 off the bucket list. A police car out front on the return leg kept our speeds fairly sensible, but the Manthey Porsche 997 GT2 M600 will top 203 mph where limits allow: 200 reasons to open your wallet.