Need Header Head Pipe Help

1st pic: Pretty self explanatory. 2 pipes bend down in front of the z-bar.
2nd pic: Head pipes come under the car parallel, into the y-pipe.
3rd pic: Single pipe into 40 series Flowmaster, dumped at the axle.
I had a flange welded onto the y-pipe so the system un-bolts
if I need to get to the trans.

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Nice! I like the addition of a flange behind the Y pipe.

How far below the transmission cross member would you guess the whole exhaust system is? 3"?