When I did my headers (bbk) they blew out in a few months, then I went threw another set. but at auto zone, they had some soft flexible aluminum ones that have been on there for over a year now and work great. They were thick and multiple layered. I recommend looking into them.
1995 5.0 u/d,cai,t/b,shorty headers,x pipe,flows 40's,373 gears, alum. driveshaft, alum. radiator, shift kit, e-cam, ported upper and lower intake, 100 shot of spray, 2100 stall, black 0304 cobras. suspension: upper and lower control arms, sub frame connecters, and springs all SVE