No worries about the holes I have taps and dies etc at home at the end of the day its well worth the effort fitting yourself

I had the privlage to walk around the Factory and see one of these in the making. After all the work that goes into these I can't understand how they make a profit on them? They are easy to fit if you're handy with the tools. Just a tip, install your vacuum hoses prior to installing the plenum as they are hard to get to once it's down. Also go to Supercheap and buy a right angle drill attachment ($17) to drill the back hole of the bottom manifold so that the stud can go in as a standard drill will hit the firewall. You cannot beat the build and quality of this Plenum and the boys at Plazmaman are a real pleasure to deal with. Thanks Oyay and Alex!