Just finished the install on my 04 G35 and this post is to give credit where it is due. The JWT kit has a ton of individual parts and I still received it within two weeks of ordering. Compare this with the sad delivery performance of some other manufactures as observed recently on the message boards. The questions I called in were answered by Jim Wolf directly and we spoke about 4 times during the install. You will not find a more knowable person on Nissan/Infiniti and the quality of the kit parts are first rate.
I did the install myself and without pulling the motor. It is possible but it isn't easy and if you use another installer I suggest you find some one you can really trust since some of the work is challenging but you don't want anything skipped over or left out.

 

props to you on the DIY and congrats on your new found powah!

 

This + 1 million.

 

Added AEM water/meth injection and a custom 1 gal tank since nothing but a 2 qt off the shelf tank would fit into available space.