*some people like the sound, some don't... I personally find it too raspy at some RPM ranges. At other ranges, my car has a very sexy growl. I run the SVT header, ORP, SVT flex, 2.5" mandrel-bent stainless from there back with a 14" Magnaflow resonator and Borla muffler. I get compliments from friends when I'm growling around quietly, and when letting it scream, but complaints when cruising on the highway.
I haven't bought that yet because I need to get under my car to measure the ORP... 11" is pretty long... but I think it'll fit. Should definitely tone down the rasp... not to mention the pollution and smell. Designed for engines up to 5.9L, so I'm guessing I won't have any flow problems
Here is the how-to on how to convert the ORP to HFC. I think it would be good if we could get a local welder to make some HFC and sell them on here. Since CFM doesnt have any in stock. I cant find any HFC anywhere!