I totally agree, unless you're running your car at the track on a frequent basis it's almost a waste of money and trouble. Some of the headers are a real pain to install and the ones that are easier to install are really expensive. Paying $300 more for 6-7 horses just doesn't seem worth it to me....but that's just me.
The chart posted is the main reason I started selling the 340 driver/360 magnum manifold combination. Of course I have to machine the 360 magnum to get it to match the 340 but it's something that I've gotten pretty good at doing. The best part about the large cast iron manifolds is ease of installation and low price not to mention no leaks or scraping on the speed bumps!!
