kit does include everything too bolt it up however. How do you know the Z1 chip wasn't setup accordingly? and lets not forget the key words here.. "Standard tuning practices as you would have" for the NISMO or PE injector upgrades. Just think its funny to "not do it again" due too a tuned chip from another vendor not working out on this setup. Btw 300degree rail still needs grinding above the #1 injector to still fit properly. Not trying to be an ass or nothing, Just saying. :)