The Classic Retrofit 3-pin CDI+ ignition unit is a direct replacement for Bosch CDI units used in the classic Porsche 911 from 1969 to 1977. Extensive development and rigorous dyno testing has proven our CDI+ unit to be a major improvement over the original Bosch CDI, with improved torque right across the rev range.

We have now supplied more than 350 CDI+ units to very happy customers all over the world. We support our units with a lifetime warranty: subject to zero electrical abuse! Check out the online Porsche communities for the many great reviews of our products - they are far superior to the cheaply made and overpriced unreliable alternatives available elsewhere.

CDI ignition was originally fitted to a great many European sports cars of the 1970s and 1980s, including Maserati Ghibli, Alfa Romeo Montreal and are popular with BMW 3.0 CSL racers. Our CDI+ is a great upgrade for all of these applications.

Find product manuals here. See our shipping and delivery FAQs here. Don't forget to check out the Classic Retrofit Technical Support forum.

Check out our latest CDI+ product video, showing how to install the unit and how to optionally lock the distributor to use the CDI's internal spark mapping software.