Original Beru coils. They are poorly made so they cannot produce a nice spark and they hardly last up to 10'000 km. They produce OBD error codes. We offer solutions for these problems.
In the 90's Porsche had to switch from air cooled engines to water cooled ones to pass the new EURO 3 norms.
The "new generation" engine (water cooled) arrives in 1996 with the Porsche Boxster, followed by the 996, the Cayman, the 997 and the 991.
Porsche only had the experience of the water cooled 924 ; 944 ; 968 and 928.