x and h pipes

What do you guys think of Flowtech Raptors?

I have a true dual on my 318 in my '73 Dart with Hooker Performance headers and it's a pretty raw sound, I don't have an X or H pipe on there. I must say after reading all of this thread I"m still not decided on whether to go with an X or H pipe....my 318 won't rev over 5200 anyway probably so for the cost I should just pull my pipes off and put an H in right get a bit of low end torque and slightly better flow right?