This is what I currently have done to my Z.
-K&N Typhoon Intake
-HKS Replica Catback
-TopSpeed Headers
-Eibach Lowering Springs
-TSW Racing Wheels
-Terminator CF Hood
-Smoked Tails
-CF Shift ****
-Two 12" Rockford P3s

My question is what should i do next?

 

get rid of those springs and buy coilovers.
close thread.

 

Stickers. lots

 

NOS stickers, especially. They add HP.

 

Stop for now until you know what you wanna do with the car.

 

Not sure if the topspeed headers replace the exhaust manifolds AND cats, but if they don't definately HFCs or test pipes.

Pic of car would be helpful but based on the list of parts already on your car, i'd consider replacing some parts before adding anything else.

 

edit-just realized you made two threads for some reason....

 

Took care of the other one.

 

I also have a question on what the "header" install includes.You need HFC's or test
pipes to give you optimum results for you exhaust system.
After that,everything you have done will not work right unless you get a tune.
Your car as it now stands without a tune has got to be running very lean.
If there is not a tuner in your area that specializes in our cars,I suggest you take
a trip to the Atlanta area and see Z1 Motorsports.I'd think you could make an appointment and drive over,get it done,drive back in one day.

 

Motordyne ART
XYZ (straight)
In Dash navigation system
Shockwave or Nismo Catback

Just my .02

 

This confuses me.

What are you trying to accomplish here? It sounds to me like you are just throwing parts at your car without a plan.

 

lift kit and monster truck tires

 

shocks and get rid of the riced out tail lights

 

Throw some D's on it

 

Next mod should be you reading this thread:

https://my350z.com/forum/engine-and-...to-your-z.html

 

Anyone that knows anything about Z's knows you're not ballin unless you roll on 22's.

 

pssh!!! 22s? gotta get 30s have the DONK Z!!!!

 

Big aluminum spoiler mounted backwards on the roof!