Identify Your Porsche 928
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Model: 928
Manufactured: 10/1977 through 1982Units Manufactured: 17,669 Powerplant Options:1977-79 219 HP 16v 4.5L K-Jetronic (North America)1977-...
Super Spider
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Super Spider is our supercharged Alfa Spider project. It is a 1985 Graduate model and is currently in development. The supercharger kit being developed on this car will be available for purchase on HPSImotorsports.com
Last update: Oct 23rd 2023 (includes dyno graph)
"Do I Need Bigger Injectors?" is one of the most common questions we get, and to provide an accurate answer requires a bit of knowledge about the i...