I am planning to lower my car with TIEN Stech springs. Do i need to replace the shocks too? are they good springs? will the ride feel like stock?

 

I'm not sure about TEIN since I have never used them, but I've heard a lot people use them. I got my car lowered about 2 months ago and I used H&R sport springs with the stock struts. I'm pretty sure my H&R are lower than TEIN. It's not a must to change your struts, but it would be a good touch. I would recommend KONI. The only reason I didn't change mines, is cause they were semi-new. Later, I'll probably go with the H&R race springs, which are about 1/2 inch lower, and KONI struts. If u feel you're struts won't last too much longer, change them out now to avoid paying double labor.

 

I actually did a write-up on this:

http://heeltoeauto.com/httech/YaBB.pl?num=1186126842

 

I think my TL rides great and after taking a trip through the country roads of Austin during an Acura Meet, I know mines don't bottom out. I went through some pretty steep streets and I was flying, but no bottoming out.