Whew! I almost fell for that one.

 

Actually, low slow was a little off with his explanation of sidewall height. The 50 in our 205/50-17 tires is the sidewall aspect ratio. It is the percentage of sidewall in comparison to the width(205mm) of the tire. A 45 profile tire in a 225 width has almost the same exact height as a 50 in the 205 width, thus there is no difference in gap, height, or diameter.

Here is a helpful link if you want to determine proper tire sizing relative to stock. :

http://www.miata.net/garage/tirecalc.html

you can compare sizes there.

coilovers are exactly what the name implies. they are a self contained unit with the strut centrally mounted inside the spring. There is height adjustability, and possibly 5 other sdjustments that can ba made, from dampening, to rebound to load, to perch height to compression. They are much more tunable than traditional spring/perch setups. You would lose the eibachs if you went to coilovers, but would gain a better setup, for sure. The coilovers will have a much better ride, as well as handling than either stock or lowering springs if done right. Mopar s3 co's are fantastic. They do run close to 1500 smackers plus install, though.

 

I have the mopar bov also, it has its own unique sound, love it. like what silver surfer said, wait for it to cool down and get a racheting wrench, works for the pain in the As$ third bolt