It's specified in Mace’s website that the manifold insulators are not suitable when used in conjuction with CPR6 manifold, what is the reason for this? And is it possible for Mace to manufacture a one off insulator that will fit the CPR6, I have a 175Kw

The main issue is the lack of clearance of being able to facilitate their installation in a Commodore. In saying this though, people have installed them before, however, they’ve been required to modify the bodywork to suit along with using longer bolts than the ones supplied in either kit, certainly nice :) In this case, our off-the-shelf manifold insulators may fit, depending on how much room you have