Porsche Turbos are hard on spark plugs. The difference between the 996 and 997 turbo is the variable geometry turbocharger. That little actuator makes the job completely different between the two models. Both require the bumper and intercoolers to be removed. But to change the #3 and #6 coils and spark plugs on a 997 turbo you have to go a little deeper. Take a look at the video to see just how deep. And for the DIY crowd, we recommend Denso PK20PR-P8 for the Porsche 997 Turbo. Better life and more consistent spark for these highly stressed engines, especially if you have a software tune and any other upgrades. And gap them at 1-1.1mm (0.25").