I had a set of these once, leaked, hit my 4'' downpipe, took them on and off more times than I can remember, lucked out and found a NEW set of TA stainless on eBay that I "snipered" for 650.After I installed my new 72 turbo, I was having a problem with the 4'' intake smashing my upper radiator hose into the WP pulley, no fun!! Soooooooo I took my chop saw and cut a section out of my Chinese headers and used that for the "cross over" that went between the pulley and the intake tube. Now the intake tube doesent smashmy radiator hose closed. See they are good for some thing!