I have the exact same engine; my VS is also a 2004. They would work, but I suggest porting your heads (or changing your heads to 40 by 35.5 valves) and changing your exhaust to a larger diameter one to take advantage of their increased performance. I'll be doing just that as soon as my car hits 6,000 miles on the odometer (quite a ways to go since it's only 4,200 now and I don't use it as a daily driver). I've been buying the parts (CB 044 heads) and I already have all I need including a pair of Dellorto 40's, which would also do the trick for what you want. I also have some Gene Berg valvetrain parts as well as a Gene Berg crank pulley which I'll be installing along with a nice Tri-Mil muffler.
