Hey there brotha!
Welcome to the forums and Congrats on the Z! Happy modding
As for modding, the spacers, I just put 25mm in the back and 15 mm in the front and the Z looks a heck of a lot more flush and even. The stance is overall better
Other than that, I have a pair of AAM Competition short tails for sale if you're interested. It takes the whole muffler and tips attachment from the axlebacks off and then replaces it. Sound is a heck of a lot better and louder than OEM and is a great start for an exhaust if you aren't looking to spend a huge amount. PM me if your interested brotha
As for wheels, if you are going to do spacers, go with some mid-line wheels that are NOT custom. If you want to get some nice wheels that are custom to where you don't need spacers go; VOLK, SSR, etc.. They usually are $3500-$4000 for the set though.
Remember that stickers are +5hp
