yeah the springs between IS's are all interchangeable. feel free to put on is350 s.tech, on the front driver's side. one is250 prokit on the front passenger side. one is350 megan spring on the rear driver's side. and finish it off with an espelir active superdown on the rear passenger side....


now that is a joke.

and m_shockers, if the guy said that to me i would say...so why are the F suspension parts made by Bilstein? oh right, because they wanted it to have an awful ride. i forgot.

 

The owner of sonicms is my friend and it doesnt matter to him which spring i get. He just recommended me to use tein. He's not saying using a european brand is bad for japanese cars, hes just saying it is better to use a japanese brand. Well thats his opinion and i trust his judgement. I'm sure other springs are great too.