H- or X-pipe on side exhaust

I added a TTI X-pipe and Dynomax Ultra Flo mufflers to my TTI headers ending at the rear housing on my race car. It picked the car up! X-pipe is better than H-pipe if you have the room under the car.

I don't recall the details but I think there will be a difference in performance between having the mufflers at the headers and further back. X-pipes or H-pipes are also recommended to be as close to the headers as possible. Having mufflers first may reduce velocity and hurt the scavanging effect at the "X" downstream. Don't know how much, but it seems like it would reduce the benefits.