Welding quads to the tips would be sweet. I'm not sure I care too much about the burnt look, so titanium to stainless i guess wouldn't be a problem. I would be happy with stainless quad tips. It sounds as tho the bumper and exhaust are designed for each other tho...which sucks. The hole does look big enough to support my stillen CBE, but even if so, I agree it may not look right. The question is, can I just weld quads on my stillen exhaust and use the zele bumper? I'm really digging this kit, but no way I can scrap my exhaust for the zele