gonna lower my 98 sti only by 30mm. was wondering can i just change the springs or do i need to change the shocks too?

 

you can just use springs, but be careful as most heights quoted by manufacturers to do with how much their springs lower are normally from the standard turbo height, and i believe sti's are slightly lower than that as standard so you may not get exactly what it says on the tin

 

cheers mate didnt think of that