Thats an awesome idea!! Since they are slightly flexible, you dont have to be a percision welder and they might be easier to get back in after your doneThere are guys that make their own with stainless steel flexible inserts. The cut out a length from their up-pipes and weld in the flexible inserts. They seem to like them and its cheap if you can do the welding yourself or have a friend who can. The inserts might run you $60 for real good ones. Just a thought. Happy hunting!