http://www.drgas.com/store/product.p...&cat=21&page=1

This is what I was looking at, and I can't figure it why it's so expensive, and to make a true dual system it'll cost over $1000 right? The mufflers themselves are less than a 100 so why so much?

Also, I prefer how spintech sounds so could I buy their muffler(s) and build a cheaper side exit system?

 

You certainly could build it cheaper yourself. I'm building mine from headers to tip for a bit under 300$.

It will look something like this but i'm gonna move the mufflers up a bit and run them out the sides.