X pipe or H pipe, again

I will be dynoing my new exhaust setup pretty soon, just like I did with my old setup.
But I updated everything in the exhaust; went up in size from 2-1/4" to 2-1/2", going from the castiron manifolds to headers, from seperate pipes to an X-pipe, and from stockish mufflers to Borla Pro XS mufflers.
Every with mandrell bends, compared to 'pushed in' bends before.

The current system is too large for the 318 in the car at the moment, but will be more in line with the upcoming 360 swap, after which I will put the car on the dyno once more.