I had a set of Mazdaspeed 3 speed springs put on my car with my stock struts. I had also experimented with a set of Mazda3 5door Tein coilovers which bolted on easily enough. But I went with Ksport coilovers instead, because they were 5 specific. Hope that helps...by the way the 5 is heavier so it rides lower. Post pics of your ride if you decide to get the suspension. I would just go with 5 specific parts to be safe anyways. I kno the 3 parts fit, but the long term reliability I'm not so sure of, because the 5 packs on a few extra hundred pounds....or something like that.