So I had to swap out the Neuspeed springs for the stock springs to pas s the safety, I bought the car with the drop and it is nice looking, but it's not really practical due to street conditions and the garage I drive into. What do you guys think about stock vs Neuspeed (other aftermarket) springs? Any real advantages? And I actually dont mind the look of the car on the stock springs, but being low is nice.

 

I personally don't have them but a friend of mine has a set on his ITR. He has the ones that lower the car 1 inch, he told me he scrapes his exhaust and his front lip every now and then. Besides that he enjoys them.

 

If you enjoy crappy spring rates then go for it. OEM ITR, Koni/GC, or AMR.

 

Neuspeed Race springs have an excellent spring rate 455 front x 360 rear that is a much higher spring rate than OEM and closer to the rates that the NSX R enjoys. I can't recall if they were progressive or linear but I sort of remember them being linear. I had these equipped on my previous car. They're definitely harsh for street driving. I would say Spoon Race springs have the best spring rate all around at 448 front x 448 rear there is equal distribution front and rear at about twice the rate of an OEM ITR which has a 250 x 250 configuration. My Neuspeeds were mounted to Tokico Blue shocks but I'm not certain that is the best choice available now. This was a long time ago. If I was going to install aftermarket stuff today I would go with Spoon race springs and shocks.

 

yikes, a tokico blue has less rebound control than OE itr shocks

the tein h and s tech are the only lowering springs i know of that were smart enough to copy the factory itr rates and increase them slightly, roughly 15-20%

the h&r / neu race springs are waaayy too stiff for anything outside a koni sport, illumina or agx

 

I agree with this and perhaps the only other set I can think of is the DR Racing spings from kg/mm.

They were also progressive all around and worked quite well with the stock dampers. They're quite hard to find now.

 

I'm pretty sure the Eibach sportlines are pretty similar to factory rates IIRC. I have a set lying around I can look for the numbers on them.

 

i don't think so actually. the pro kit might be if it's specific to the R

sportlines are usually 20%+ stiffer and pretty low. may be comparable to a tein s tech but you would have to check