Any headers that only read 1 bank on the front O2 really needs a WB if making any kind of decent power. I havent had first had experience with these but I like the 1 joint crossover design. Like any other crossover that utilizes a donut style flange I recommend putting high temp RTF on the donut coating all sides before installing it.
Every header design has it's flaws so it just depends on your taste I guess.
TOGs - blocks bell housing bolts, known for leaks when REinstalled
TOG Extreme - same issues but have 1 3/4" primaries
SLP - leaks from slip joint design, my least favorite from my experience
Pacesetter - Leaky downpipe, front header comes in contact with fans when lower mounts wear even a little, but 1 3/4" primaries
S&S - front O2 only reads 1 bank
