I've purchased a pair of B5 spring perches for a touch of additional lowering up front but have a query re the rubber the spring 'should' sit on.
For those that don't know of this mod, the B5 spring perch sits approximately 15mm lower that the B7.
On a B6 and B7 the plate has a rubber plate bonded to it that the spring sits on to protect the seat and spring.
After searching several sites and reading the write-ups no one mentions this piece of rubber. I'm just not sure about running it without it.
Here's a pic of the difference between the two:
B7

B5

On a B5 it comes separately if you order it - I would have thought that this was pretty important to protect both the spring and spring perch plus give some additional cushioning.
However adding it I guess will lift the spring higher a defeat the object of the modification - can anyone clarify or advise please?
Many thanks
James