Product description from Bonrath:

The new generation of Bonrath spring platforms are state of the art! Made from high quality material, these platforms allow the lowest possible ride height - a far safer solution than cutting your springs wich will destroy the spring rate and reduce road holding.

Lowering Caps are specially designed spring discs that replace the original upper spring plates to provide an additional 10-15mm of lowering

JOM also sells them: PG PERFORMANCE - Performance - Suspension

now i see lol

basically they are thiner cups lol

i take it a mech will need to fit them?

You could do it yourself but taking out each shock tower plus getting clearance for the right side isn't something for the mechanically challenged (in other words be prepared for a lot of cussing)

cheers mate ill take it in when i get them lol