Well as some of you know im new to the community. I bought a car is great shape with lots of mods but lacking a much needed tune and needs a few other things. I just realized it has a decent leak coming from the downpipe. Its easy access as its on the bend to go to the cat (which isnt there anymore ). But anyway, there is a weld there with raised metal where what appears to be a place for a sensor. It is plugged but the raised metal around the threads is leaking pretty good. Now, should i just bite the bullet and have it rewelded or take some $5 epoxy and seal it. It's a crack which is why i would consider the epoxy.