I finally was about to order a set of htechs, but before I did I realized it said there was a .3 inch drop and a .6 inch drop in the rear? I was looking for more of a 1.3ish drop which is what I've read everywhere on here saying that that is what comes with the htechs. Could it be because the g37 springs that I was going to buy aren't as low and I need to look into g35 springs instead? Also after contacting them, I was told it did come with a .3 and .6 inch drop and wasn't a typing error.

 

Mine settled a bit lower than that even but It shows right on the tein website:
Tein

G37 coupe on htechs -1.5"/-1.1"

 

Interesting when looking at the Tein site it says "2dr Coupe, Lot No P0243285~" and then lists as a -1.5 & -1.1" drop, but like you said the same part # for the G35 is that minimal drop. If anything the G37s should drop a bit more, at least those w/ a 7AT since it's 100+ lbs heavier than the 5AT.
Wonder if it has to do w/ that lot number of the spring, strange
FWIW I've never seen a G35 or G37 dropped on HTechs that only dropped about a 1/2" though

 

TEIN HTech Springs INFINITI G37
Any ideas as to why there website says .3 and .6 inch drop? Am I missing something?

 

Like I said in my previous post, it lists part # SKP30-BUB00 for all RWD coupes, the 03 to 07 models show a minimal drop and the 08 to current coupes show a typical -1.5" front / -1.1" rear drop. The suspension should have changes from the 1st gen coupe to the current coupe so that would be reasonable to assume. Since yours is an 08 you should get the larger drop.
Also like I said, not sure what that "lot number P0243285" is all about since it's the same part # Here's the official Tein web application page.
HIGH.TECH

 

Yes, like Brad said, if you look at the Tein website that is the correct drop amount for a G35. Also look at the description on the site you listed, it says 1" drop, that is a more realistic drop for the G35. The numbers are all over the place but trust me, it's at least 1.5" and 1.1" for the G37.

BTW when you're ready to buy, look at the forum sponsors for better prices than that website. I bought mine through a vendor here and got a great price with fast shipping. GL