Rocker arm shaft bushing. Porsche 911 / 912 / 964  ❭  90110534403

Rocker arm shaft bushing. 
This rocker arm bush is an replacement bushing that supports the rocker arm/rocker shaft interface in the cylinder head. Manufactured to OE-style dimensions, it restores correct rocker shaft support, helps reduce valvetrain noise, and promotes smooth, consistent valve operation - ideal for top-end servicing or engine rebuilds.
Sold each, 12 required per vehicle.

Fits:
Porsche 911/912 1965 - 1989
Porsche 964 1989 - 1994

Diagram ref no 26

Worn or loose rocker arm bushings allow excessive shaft play, leading to noisy valve trains, inaccurate lift, premature shaft wear, and eventual valve timing issues. Replacing them with OE Match bushings during engine overhaul or top-end servicing restores proper geometry and prolongs the life of the valvetrain.

When to replace:
•  Crankshaft or valve train noise
•  Excessive lateral shaft movement
•  High-mile engine rebuild
•  During rocker shaft removal/service
•  Preventive maintenance

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90110534403

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