That stuff would probably work if you had problems with burning the wires... but a lot of headers burn the boot directly. Besides, it's still $60.
On my Hedman 78030 (B-body) headers a straight boot is required on plug #5, so I had to buy an extra single wire. No way an angle boot would work there. The Accel straight one is a long ceramic piece that keeps the wire well away from #5 tube.
