anyone have experience with them. they look awesome and are inexpensive but i was wondering: do they but up to factory mid-pipes because they do not come with them. are they easier/harder to install than dynatech (already did some of those, PITA!!!) i really want some headers and these seem to be a possibility but basically i want something cheap, and easy to install. also, do you have to weld your catback to they dynatechs, my friend has them on his L and this is what he had to do, not what i wanna have to do.