Modified MSA 6 into 2 header installation - photos?

[Stanley]

'73 240z with stock 240 bottom end, and head with round exhaust ports. AT so MSA 6-1 headers won't fit. Wanted equal length with 1 3/8" primaries to maximize already good mid-range torque but Stahl NLA and custom out of price range. Thinking MSA 6-2-1 for 77-78 280z but that collector pipe they supply looks a little crappy and the muffler guy would need to fabricate something to hookup to my 2 1/4 exhaust pipe anyway. Also want to extend the secondaries to equalize the unequal lengths somewhat and maybe help at midrange.

Need some photos to show the boss at muffler shop. Found one online but the merge collector looks bad, see below. Anybody have photos in and/or out of car of something like this?

[Chickenman]

MSA 3-2 header design would be better for street IMHO. Tri-Y setup emphasizes mid range Torque. 1 1/2" primary size is a good compromise for good Torque and Top end. . 1 3/8" Primaries would be a bit on the small size for either 6 -1 or Tri-Y IMHO.

Tri-Y and up to 1 5/8" Primaries are a very good combo from my experiences on an L24 to L28.

The MSA 15-6003CH design also fits ST and AT. For " Round " exhaust ports. Get it with the 2.5" exhaust adapter. Neck down to 2 /1/4" for your exhaust. No biggy.

http://www.thezstore.com/page/TZS/PROD/classic19d/15-6003CH

Edited March 2, 2016 by Chickenman

[Chickenman]

You can get all sorts of Y-Pipe merge collectors from Flow-Master, Hooker, Walker, Howe, Dyna Tech, Schoenfeld etc. Any decent Muffler shop should be able to adapt one easily or even custom make them ( Not Midas ) .  Just a matter of measuring the Primary pipe sizes and picking your collector size. Flow-Master makes some very affordable 2 - 1 Merge collectors in various sizes.

2 - 1 Merge pipes

I've used the Flow-Master 2-1 merge pipes as a Y-Pipe on 3rd Gen F-Bodies. Nice merge pipe and inexpensive.

Edited March 2, 2016 by Chickenman