Sorry if there's already a thread on this, but I haven't been able to find one. Just bought a VZ Exec. wagon (175kw), and was wanting to up the power a bit. Unfortunatley, due to the missus being in her P's, I'm limited as to what I can do (have to keep it 130kw/t). One idea I've been playing with is fitting a CPR-6 manifold with a 12mm spacer, but wasn't sure about clearance. Has anyone done this? Or know if it fits the under the bonnet? If it has been done, what was/is the power gain?