The lip that comes out of my stove is 6in in the inside and 6in and a 1/4 in on the outside outside will work?

Great question. Unfortunately, this will not work with the dimensions you have provided as the pipe in this kit is 6" inner diameter and 8" Outer diameter. To better assist you in finding the specific part you need, you can either fill out our Parts Quote form, Part Quote Request, or you can call in and speak to one of our experiences customer service representatives at 1-888-346-1036. Thank you and have a wonderful day.