Heat wrapping manifold

[M.C..]

I am thinking of wrapping the manifold but don't want to remove it as it is a pain.
I only want to keep the radiant heat away from the coil wires as it is affecting my shift light.
Just having a little look I could probably do to the red lines fairly easy with in inlet removed and possible get to the yellow lines done, how much would this help with temps and how much wrap is needed?

 

[bloke]

insulate the wires instead?

 

[M.C..]

I have thought of that.
Using the silver reflective stuff with velcro so no wires need to be dismantled but it is not cheap, and I just looked at the manifold and wrapping it crossed my mind.