If i wanted to drop my coupe an inch or so, would all I have to do is buy like the Tein H-Tech springs and install them? No other parts or things needed? Sorry for the stupid question, but I've never done any suspension mods before.

 

There are dozens of threads on this, should be able to search and find more than you care to read. Simple answer: If you want to do it right, consider buying shocks and camber kits as well.

 

for the budget oriented....do a mild drop.

based on the summary ive read so far, you might want to consider the
350z h-techs and do an alignment 2-3 weeks afterwards. then it will
cost you the least, unless you can find a friend with a 350z stock springs
that would be willing to give them to you.