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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.

Drive Belt for Under Drive Pully cars WITH Aircon. Porsche 996/ Boxster 986/997

What size serpentine belt to run when using an under drive pulley?

The stock serpentine belt length for a 986 Porsche Boxster or Porsche 996 with air conditioning is 2115mm Porsche part # 996 102 151 64. If you remove the air conditioning but keep the stock drive pulley you will need a new serpentine belt that is 1930mm in length. If you then decide to add an underdrive pulley in the range of 4.25 to 5 inches in diameter you will need a belt 1905mm in length. For those of you who would like to add an under drive pulley with air conditioning, the proper length is 2101mm.

So in review:
Stock pulley w/ air conditioning - 2115mm
Under drive pulley w/ air conditioning - 2100mm

Fits:
Porsche 996 3.4L
Porsche 996 3.6L
Porsche 997 3.6L
Porsche Boxster 986
Porsche Boxster 987

Drive Belt for Under Drive Pully cars WITHOUT Aircon Porsche 996/ Boxster 986

What size serpentine belt to run when using an under drive pulley?

The stock serpentine belt length for a 986 Porsche Boxster or Porsche 996 with air conditioning is 2115mm Porsche part # 996 102 151 64. If you remove the air conditioning but keep the stock drive pulley you will need a new serpentine belt that is 1930mm in length. If you then decide to add an underdrive pulley in the range of 4.25 to 5 inches in diameter you will need a belt 1905mm in length. For those of you who would like to add an under drive pulley with air conditioning, the proper length is 2101mm.

So in review:
Stock pulley w/o air conditioning - 1930mm
Under drive pulley w/o air conditioning - 1905mm


Fits:
Porsche 996 3.4L
Porsche 996 3.6L
Porsche Boxster 986

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Underdrive Pulley for Porsche 996/997/Boxster 986

Brand: RSS

The RSS Lightweight Underdrive Pulley is made from 6061-T6 aluminum. Offers improved HP & TQ by reducing drag from the power steering pump, A/C, water pump and alternator.

The RSS lightweight underdriven crank pulley is designed for Porsche owners who are looking for a easy bolt-on 7-10 rear wheel horsepower. The CNC machined pulley fits all Porsche 987.1 Boxster and Cayman cars. The idea of the underdrive pulley is that it will reduce demand that the stock pulley puts on the power steering pump at high engine revs. Not only will this preserve the longevity of the pump, it will also improve performance, throttle response, and give the track racer a car to be confident in. Since the pulley is lighter then stock, the rotational weight reduces load on the engine slightly. This pulley kit includes the removal and install tool in addition to a new bolt for easy install. With the inclusion of these tools, you can switch back to the stock pulley if needed for warranty purposes. This is an absolute must for track drivers!

Replacement Pully for Original Porsche parts No. 99610211563

Fits:
Porsche 996 3.4L
Porsche 996 3.6L
Porsche 997 3.6L
Porsche Boxster 986
Porsche Boxster 987

**Please note you will need a new shorter Pully Belt which you can purchase from us.
99610215199/1
Under drive pulley w/ air conditioning - 2100mm

99610215198/1
Under drive pulley w/o air conditioning - 1905mm