These bolts are used to secure the flywheel to the engine's crankshaft. Whenever the flywheel is removed, is it recommended you replace these bolts, as old bolts can stretch and lose strength if they are reused.
Flywheel Bolt, Crankshaft to Flywheel, 10 X 50 mm (8 per car, sold individually), Boxster/Boxster S (2005-08), Each Brand: OEM [More Info]
Flywheel Seals (Rear Main Seal)
Flywheel Seal, Boxster/Boxster S (2005-08), Each Brand: Victor Reinz [More Info]
Main Shaft Seals
The Main Shaft seal prevents transmission oil from leaking out the driveshaft into the flywheel/clutch area. This especially gets messy when the flywheel starts swinging oil around like a Texas twister!
Main Shaft Seal, Boxster/Boxster S (2005-08), Each Brand: DPH [More Info]