Porsche Service Information Manuals for '78 (left) and '79 (right). Describes the principal changes and innovations on the 928 for that model/year - what was changed and how does it work.
Includes information on every detail of the new 4.5L water cooled engine, transmission specs and details, alignment specs, suspension details, body info, locking system operation, climate control description, relay and fuse assignment, warning system function, and wiring diagrams.
Invaluable to any early 928 owner!
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Technical topics and info related to early 928s