Originally Posted by mazda/nissan
Anybody have any experience with this? Or more precisely the FM shocks with the Illuminas?
Shaikh of FatCat (who is not known for generously lavishing praise upon things FM sells) speaks rather well of the FM Springs / Illuminas package. I have the springs on my car, and coupled with a set of Shaikh's Bilsteins, NB mounts, and 36mm bumpstops, they are phenomenaly comfortable on the road and yet also handle quite well.
Those mounts will be useless to you as-is. They're just the housings, without any of the mounting and rubber bits.
Some folks have done their own DIY NB mount conversions. Search around and you'll find examples. If you don't want to go that route, you can buy a complete set of ready-to-install NB mounts from FCM: Fat Cat Motorsports - Tokico products - Miata - 90-97
These are nice in that they free up some suspension travel, though on my '92, the combination of the NB mounts and the FM springs lowered the car just a tad too much for my taste. It would have been fine but for a couple of particularly nasty speedbumps in the apartment complex where I lived at the time- I dragged the framerails across each one. I lathed some aluminum collars to raise the spring perch on my shocks, but you can also buy some plastic risers from FCM that go between the spring and the mount- they give you back some ride height, and yet more
suspension travel too.
If you do go this route, be sure to call Shaihk and talk to him. After the Bilstein sales pitch, he'll get into specific recommendations about which bump stops to use with your specific suspension combo.
One other thing- after this is all in, disconnect your rear sway bar. Trust me, just give it a shot and see how you like it.