hey guys, I did a google search and came up short when I looked for a Energy suspension part number for NB polyurethane upper spring isolator (damn that's a mouthful). I see that Miata Roadster has a bunch of parts but I have no idea which is the right one. I have an NA and I'm trying to put NB Top hats on the car but the springs move around a lot and looks like some isolators would fix this. Help?

link to what I have found so far.
http://www.miataroadster.com/energy-suspension/energy-suspension-coil-spring-isolator-set/g-52074.aspx

 

Go to Summit Racing and search for Energy Suspension 2.5" spring isolator. It's also in the better Bilstein thread in multiple places.

Sorry, on my phone.

 

I have two for sale in my sale thread for a few bucks cheaper than yo can get at summit. https://www.miataturbo.net/miata-par...mbstone-91774/

 

Where are the 2.5" number coming from? I see it everywhere but when I measure my Flyin Miata springs the ID of the spring is ~3.3" which is supposed. To be similar to the Miata springs. When people say 2.5" springs is it not actually 2.5"?

 

Sorry, I ASSUMED you were asking about coilover parts. Try this; Energy Suspension Coil Spring Isolators

 

Yep those are what I have been looking at. So when people talk about 2.5" springs they are referring to the Ground control sleeve like setup and a different top hat? Forgive my noobishness but it's not super clear on the web.

 

If your just changing NA mounts for NB but keeping the same spring you need a thicker isolator to keep same height (or live with the lower height).

Thicker isolator: Urethane Spring Riser for 99-05 Miata Shock Mounts

In answer to your question re 2.5" springs, that's correct.