Heim joints can be replaced with quality units easily if they do not come with good ones. Higher end heims have been quiet and problem free for me on the street or track. I have been waiting on SPL to release their own FUCAs, which should be identical in design to the GKTech units (based on old R32 GTR group B? race car design). SPL has put the Z32 chassis on the back burner and it has been years since they were supposed to release this design. At this point I am not sure they will ever come out.