I'm sure it isn't neccesary, but recommended.

+1. same here.

dvsmeth0dz what aftermarket struts do you have and how much did they cost?

Tokico D-specs should run you about 500 for the set front and rears....I'm running on stock struts which is fine but you'll have to change them out sooner as they're not made to take the added stress of the lowered vehicle weight. As i'm 49k right now I've been told I should change them about 60k.

oh I just went with the tein basic coilovers. Got it used for $500. The ride is a bit stiffer than the stock sport suspension and so far I like it.

Like a lot of others have said, I don't think personally that it is necessary but its recommended for a better ride since the stock struts are configured to ride with stock springs. My car is bumpy because the struts don't have much room left to move up and down since the springs bring the car down so low, with stock 18's the car looked like it was SLAMMED, crazy camber. With the wider 19's the car still looks low, but the camber isn't as bad since I've got a 19x10.5 wheel in the rear.

Thanks Infinite1 and Locksmith for the info

anyone else?

I have S-techs and the D-specs. S-tech drop is .9" and 1.1" for front and rear.
CVR motorsports sells D-specs for 479 shipped. I got it from them from the vendor marketplace.
I personally went with the S-tech drop because I saw pics of the H-tech drop and it didn't really look like anything to me. I'm very satisfied with my drop
After settling, I took my car for an alignment. Front were not within spec, they were about -2 degrees.
Rear, they got the back left in spec but not the back right.
I bought an Ichiba front camber kit ($315) but haven't installed it yet.

Pics of the drop...
https://g35driver.com/forums/nationalgclub/217901-woohoo-first-set-rims-pics-inside.html

Hope that helps with your decision

^^^ Thanks

To put in my 2 cents, the need for a camber kit with 350z H-tech's vary by car. But if you are unlucky like me you will need front and rear camber kits with a 350z H-Tech drop.

After I put on my springs everything was cambered to hell and I started noticing premature tire wear on the inside after just under 4k miles. I got the SPC revised fronts and regular rears recently, we'll see how my tires do.

So if I were to do any drop, especially if the car is driven a fair amount, I would budget out enough funds for the possibility that you may have to buy both front and rear kits and install and alignment (that's about $850 right there) in case.