Does anyone know how long do the Teins HA last under normal wear and tear. I have them for about 40k+ miles already and I'm starting to noticed my car getting boucier.

 

40K miles!!!
could it be Normal wear & tear on your WHOLE car???

stiffen the struts... tax your bushings
heavier/wider/bigger rims... etc etc

 

40k miles is way low imho. at least 60k miles i would expect. if your setting is far from the factory spec of 8 clicks, you are going to wear out the shocks faster

 

Just checking, but what's Tein's warranty like ? Is it like Bilstein and valid as long as you own the vehicle ?

Bilstein's warrany is one big reason why i went with PSS coilovers instead of Tein HA. Not to mention Bilstein is local to San Diego so if worse comes to worse i suppose i could drive up there and get my free replacements