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Tensioner Element.
Genuine Porsche product

Fits:
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2006-08
Porsche 997 Carrera 2005-08

Diagram ref No 2

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Drive Belt Tensioning Roller.
Genuine Porsche product.

Fits:

Porsche 997 Tiptronic
Porsche Boxster 987 Tiptronic
Porsche Cayman 987C Tiptronic

Click 'zoom in' for the large parts diagram.
Diagram ref No 8

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Drive Belt Tensioning Roller.

Genuine Porsche product.

Fits:
Porsche 996 Manual
Porsche 997 Manual
Porsche Boxster Manual
Porsche Cayman 987C Manual

Diagram ref No 8

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Drive Belt Deflection Roller.

Fits:
Porsche 996 Manual
Porsche 997 Manual
Porsche Boxster 987 Manual
Porsche Cayman 987C Manual

Diagram ref No 15

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Drive Belt Deflection Roller.

Fits:
Porsche 996 Manual
Porsche 997 Manual
Porsche Boxster 987 Manual
Porsche Cayman 987C Manual

Diagram ref No 12

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Drive Belt Deflection Roller.
Genuine Porsche product

Fits:
Porsche 996 Tiptronic
Porsche 997 Tiptronic
Porsche Boxster 987 Tiptronic
Porsche Cayman 987C Tiptronic
Porsche Boxster 986 Manual & Tiptronic

Diagram ref No 12

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Drive Belt Deflection Roller.
Genuine Porsche product or OEM Replacement

Fits:
Porsche 996 Tiptronic
Porsche 997 Tiptronic
Porsche Boxster 987 Tiptronic
Porsche Cayman 987C Tiptroinc
Porsche Boxster 986 Manual & Tiptronic

Diagram ref No 15

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Engine Balance Shaft Gear Wheel.
Genuine Porsche product.

Fits:
Porsche 924S 1986-88
Porsche 944 1982-91
Porsche 968 1992-95


Click 'Zoom in' for large parts diagram.
Diagram ref no 3.

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Billet aluminum IMS to crankshaft chain guide / tensioner, replacement for Porsche part no. 99610516554 or 99610516555, to help prevent catastrophic engine failures like this. Shown in the image a comparison of our billet tensioner paddle compared to the cast factory tensioner. Billet construction provides a significantly stronger and more durable product while utilizing OE Porsche wear pad and pressure pin (both of which are included as shown).

Update: We've found the factory plastic pressure pin to not be strong enough, so we've made a billet steel pressure pin against which the chain tensioner actuates to tension the crankshaft to IMS drive chain. This is a return to a style of pressure pin found in very early examples of the M96 engine.

If you choose not to upgrade to this item when your engine is apart, please at least purchase a new one from Porsche rather than re-using the old one, even if it looks fine! We recommend our billet tensioner paddle where vehicle will see track use.

Fits:
Porsche 986 Boxster / Boxster S 1997-04
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2006-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 C2 / C4 / C2S / C4S 2005-08 COUPE/CABRIO

Click picture for large parts diagram.
Diagram Ref No 18.