Intermediate shaft sprocket. Porsche 911 / 964 / 993 / 996TT / 997TT

Intermediate Shaft Sprocket / Timing Gear.
The OE Match 90110512504 Intermediate Shaft Sprocket is designed as a direct-fit replacement for the factory sprocket mounted on the intermediate shaft in many Porsche 911 models. It meshes with the timing chain to drive cam or auxiliary components, maintaining precise synchronization between crankshaft and camshaft assemblies.
Sold each, 2 required per vehicle.

Fits:
Porsche 911 1970 - 1989
Porsche 964 1989 - 1994
Porsche 993 1995 - 1998
Porsche 996 Turbo / GT2 2001 - 2005
Porsche 997.1 Turbo 2007 - 2009 (Engine type 9770)
Porsche 997.2 Turbo 2010 - 2013 (Engine type 9770)

Diagram ref no 28

The sprocket features correctly machined tooth profiles and balanced construction to minimize wear and chain noise. Each gear is dimensionally matched to Porsche factory specifications, guaranteeing perfect alignment, secure fitment, and long service life.

Ideal for use during engine rebuilds, timing chain service, or IMS restoration, this replacement sprocket restores proper chain drive operation and timing integrity to your air-cooled flat-six engine.

•  Position: Mounted on the intermediate shaft (IMS) within the timing chain housing
•  Function: Transmits rotational motion from the timing chain to cam drive or auxiliary systems, helping to maintain engine valve timing integrity.
•  Symptoms of wear: Chain rattle, poor timing, metallic noise, valve timing error
•  Benefits: OEM fit and durability, precision-machined teeth, corrosion resistance
•  Installation: Direct-fit replacement; replace with new chain and tensioners for optimal timing performance

An intermediate shaft sprocket that’s worn, damaged, or misaligned can introduce timing error, chain slack, noise, or accelerated wear of timing components. Replace it when:
•  You are performing a timing chain or IMS overhaul
•  You find tooth damage, pitting, or wear

•  You observe abnormal chain noise, jump, or performance loss

Using a fresh sprocket restores the proper tooth engagement, accurate timing, and longevity of the cam drive system, helping avoid expensive engine damage.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90110512504

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