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

Intermediate Shaft Sprocket / Timing Gear
The Genuine Porsche 90110512504 Intermediate Shaft Sprocket is the factory-engineered drive gear that ensures precise timing chain operation in Porsche 911 air-cooled flat-six engines. Mounted on the intermediate shaft, it transfers rotation from the crankshaft to the camshafts, synchronizing valve timing for optimal performance, smooth running, and reliability.
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

Over time, timing gears can develop tooth wear, pitting, or chain-track distortion, leading to slack, noise, or incorrect valve timing.
Replace with a Genuine Porsche part during engine rebuilds or timing service to restore:
• Original chain engagement and cam phasing
• Factory reliability and noise reduction
• Long-term timing accuracy

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Related, superseded, cross reference or alternative numbers for comparison.

90110512504

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