Take a good look at these photos so that you'll learn the differences between the "Porsche" type vs. the "Jaguar" version of the Twin-Plug Marelli Distributor. The "Jag" type Marelli distributor is also used in other car models.

Also, due to several attempts by Sellers on eBay to mislead the public while advertising Marelli Twin-plug caps for Jaguars and Lamborghini's as Marelli caps for "911R, 906, 2.8 911 RSR, 3.0 911 RSR and 914-6 GT" Porsche race cars, I found it necessary to create this photo gallery. Take a look, the last thing you need is to find out at a track event that your brand new shining Marelli Twin-Plug caps won't work in your Porsche application.

For information on a reproduction Marelli "type" Twin-Plug Distributor using the Jaguar Twin-Plug Distributor Cap and "modified" rotor, look at this Pelican Parts thread here http://forums.pelicanparts.com/showthread.php?s=&threadid=173248&perpage=20&pagenumber=1 and this other link http://www.raceservice4u.com/Twin%20plug.htm