i am neuspeed race and koni yellows.
i bought them from a friend. i replaced the bushings at the top with polyurethane bushings. when i too the strut apart the bumpstops had not been cut as the instructions read. the problem was the uncut bumpstops were smashed. and i mean like splitting, and all tore up. i cut off half of them and suddenly the ride became a LOT smoother, a LOT more controlled, and on bumpy roads i never felt like the front of the car was about to bounce into the air.