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^^^
There are a couple of things in play with that - the Porsche Turbo tax (no reason for the higher price other than "Turbo" . . . and people gladly open their wallets for it), and factoring in the removal, refurbishment and replacement of the turbocharger system components (including the scavenge pump system) - lots of time consuming, and expensive components to deal with that are not on a n/a engine.
Also, the increased head and cylinder temps of the turbo engine, detonation from poor tune, poor fuels, etc., and an absolutely dumb turbocharger oil scavenge system that promotes sending coked oil particles through the engine, all cause more components to wear out faster and experience damage at a higher rate than the n/a engines.
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