First of all. If your going to buy a midpipe, Dont.
Get a Resonated Midpipe (see the store)

Ive been driving Non Seq. with the Res. MP and was wondering how much the straight through Midpipe would help spool up,etc.. once I swapped them out.

Well the answer is NONE. plus its waaay too loud.
Full boost for me still comes on at 4k rpms.
The 'butt dyno' didnt see to show any gains. So only 30mins wasted swapping them out and I can rest assure Im not missing anything.

*Snook thanks for your insight on your NonSeq. setup and Mikey for loaning the MP for the test.

 

The butt dyno may not feel 10rwhp depending on your mods.

I have a non res mp and see full boost at 2800 with seq twins.

 

When i switched to non-seq i had full boost at around 4500, If it would come any earlier, I would have left it non-seq, but that's way too late for me to have full boost.