Mike, I've been holding off making any comments about Suplex fitted to my 4/4 as I also had new kingpins and bushes fitted at the same time. At first the ride was no better, very stiff and stiff steering although my shimmy had gone and the front end felt a lot more stable at speed on the motorway....none of that nodding.
Clearly the kingpins and bearings needed bedding in and were masking the benefits of the new springs and now 500 miles or so down the line things are starting to bed in and I'm noticing improvements. So....if anyone decides to have the Suplex kit fitted when their kingpins need replacing, do bear in mind that you may initially feel a tad disappointed!
