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Always been happy with these. They were $37. They fit right under your regular grip.Adhesive sticks to bar. You can point them "leads to outboard", file a notch in the bar end and fold the leads back 180 degrees to pass them through the bar interior. Put a slot in the bottom of the bar between the risers and bring the leads out through that slot. I then run the leads into the headlight shell and terminate there.Done it 5 bikes so far without any surprises.
I have always wondered about this style- I would think that most of the heat would dissipate through the handlebars. Is there any insulation between the heaters and the bars?