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 

Also, check out our 100% UK made Competition Ignition Coils.

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.