Big Triple Setup

i still dont get why people opt for the pressure box for the primarys. I can see exhaust back pressure going nuts! Not to steal from the thread but heres how i did mine...
IMG_20140421_211021_387_zpsh0bgoeuz.jpg

I'm not following here...what do you mean by "pressure box for the primaries?"
 
I'm not following here...what do you mean by "pressure box for the primaries?"

The tube with the wastegate at the end that feed the primaries vs the Y pipe that feed the primaries in his picture.
 
One of the local tractor puller's runs compounded triples, does that work for the Cummins?
 
Must be the year of the big triples. I'm totally digging those miter cut dual hood stacks.
 
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