Yes it is ceramic done by Zircotec. The manifolds are not standard or Libra ones and have four large bore primaries that join just in front of the door in a collector box. The cost was a tad more than quoted to you.
As regards the under-bonnet temperatures, I couldn't honestly say if it's made a difference. One still gets cooked feet in summer. If you're looking for a difference that's noticeable, you'll probably be disappointed.
