Sheldon bought all his kit from that site and his lights, they didnt ship to him directly, he had to go to a 3rd party to have it sent to him.
Keep is as stock as possable, dont put GTR fenders and and shit on a 4 door, when you go to sell it it will not help, if u where to do anything lower it with some coils or tien springs, put some Halo rings in and a nice set of rims swap the head unit out double din kit with GPS. keep it clean
But if you must have a kit like i did
http://www.bodykitskingdom.co.uk/magento/index.php/nissan/skyline/wondrous-style-body-kit-v35-sedan.html
the skirts i got with mine didnt fit so i took them back i have Ken style front and rear with stock skirts im looking for a supplyer in aus that will fit and paint skirts for around $500.