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Only point to caution is that the tires on the 9x7 platform Porsches are larger in diameter than the 9x6 platform models.
Example: 2004 986 on 18" wheels runs 225/40/18 front and 265/35/18 rear, with overall diameters of 25.1" (~829 revs/mile) and 25.3" (~822 revs/mile) respectively.
Contrast with: 2006 987 with 18" wheels runs 235/40/18 front and 265/40/18 rear, with overall diameters of 25.4" (~819 revs/mile) and 26.3" (~790 revs/mile) respectively.
(Size comparison data from Michelin Pilot Super Sport tires.)
Not sure if there's a way to recalibrate the speedometer, but it may end up reading slow with the larger diameter rear tires in place.
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-Chris
2004 Porsche Boxster 2.7 (gone  )
2004 Porsche 911 C4S Cab
1991 Porsche 911 C2 Targa 3.6
2017 Subaru Outback 3.6R
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