Has anyone used the Pypes universal 3.5" X pipe system?

In tests that we performed on a 3" X, we got more horse power when running an X pipe and dumps than open headers! However, as you get into higher hp applications, some tests we've read show a declining advantage of the X. If you are running 10.60's, I think you are still in a situation of advantage.

The Pypes 3.5" X-pipe is the Siamese design for maximum high end torque. As a word of caution, It will only fit as good as the TTI headers fit. If the TTI collectors face straight back and parallel with the ground, the installation will be fairly straight forward. If they are crooked, then it's going to be a b#$ch to install.

Also, You'll need to run dumps or custom make 3" tailpipes if you can get 3" through there. If you make the tailpipes, they need to be made with multi piece mandrel bends or you will negate the value of the 3.5" size X.