Porsche ring 123/TUNE-4-R-V-V
In case you would like to use the 123/TUNE-4-R-V-V, the 123/VW-R or the 123/VW-R-V in your Porsche, this ring wil make the 123ignition fit.
When an application of the 123/TUNE-4-R-V-V, the 123/VW-R or the 123/VW-R-V is made into your Porsche, this ring will make the 123ignition fit.
In case the length of the 123ignition is too long, this aluminum ring can be placed over the stamp. This will shorten the part of the 123ignition which fits in the engine, by 0.27in (7mm)
Vw t2 1974
It's not mentioned anywhere but this ring is required when fitting the 123 unit to a vw t2. I've just fitted another 123 unit to a vw t2 and this spacer was needed. The 1st unit I fitted I was unaware of the gap left along the shaft and had to make a spacer at the time.