I was like WTH!!!!!
San~man we layed an MSD spark plug wire (8.8 MM?) on the hood, in the louver area...then used a sharpi and traced a line even with the top of it I believe. Im not sure if you noticed, but the slits get narrower in sync with the louvers. Closest to the driver is widest and they taper in. Simple tape measer will let you get the length correct, and its a suttle thing that really improves the looks.
As for the cutting....WOW what a pain LOL. My hands were beat up and SORE. Basically we took a drill and drilled out a few holes right next to eachother to get a slit going. Then cut the fiber glass out using a hack-saw blade (yes by hand
) to get a line all the way from one side of the slit to the other....then went back for a second pass to make the opening wider. After that I used a round file (the small round file that you get in most metal/wood file packs at home depot) and slowly worked my way from one side to the other to make the slit the same size all the way accross. and TAKE YOUR TIME! Its VERY easy to get off...and the tinyest amount shows up...as seen in the last vent on my hood. Just barely got off and its not quite right.
So repeat that a few times and it should look great...BUT I would recommend doing this BEFORE its painted as you will almost for sure scratch the paint durring the process...and on mine there were random air pockets and when I would be filng it would ship off a bit of fiber glass instead of making a clean cut. I would hate to see that happen with new paint.
I also wouldnt reccomend a dremel....its would be super easy to get off, and once you do thats it. I tried powered rotarty tools, but they just remove too much material for me to be precise IMO. But you can try it...it may work for you
.
Just ask if you have anymore questions