The kit is a partial or fully delete egr kit. The instructions are not great (didn't send any) lucky for me I'm a retired heavy equipment mechanic, so I was able to figure it out. Wound up with a thick block off plate I didn't need. Also short a few bolts. Made it work. It has room for improvement all the way around in my opinion but at the end of the day I'm done. Not sure what a less experienced human would say