Porsche Vacuum Advance Rauch & Spiegel 93060291500

The Porsche Vacuum Advance Rauch & Spiegel 93060291500, manufacturer part number 462.950, is an aftermarket ignition distributor vacuum advance unit designed specifically for the 1978-1979 Porsche 930 Turbo (3.3L H6 Coupe, chassis 930). Manufactured and individually tested by Rauch & Spiegel, each unit meets a much tighter tolerance band than original equipment specifications. Every unit includes a certificate of test, documenting its individual vacuum/advance response as plotted over an expanded-scale factory vacuum advance curve. This ensures reliable performance and precise fitment matching OE standards.