My 71 240Z exhaust thread

[Zedyone_kenobi]

I currently have a 71 Zed with an MSA 6-2-1 Header that has been jet hot coated. The previous owner decided it needed a 3" pipe all the way back to the no name muffler. I have long known that I have no intention on spending life upwards of 6500 rpm very long and would like a tuned exhaust with a smaller diameter pipe (2.5" all the way back, or even twice pipes)

I have read many many threads on exhausts here, but since this is my first Z, I have noob kind of question. Can I replace my header with a new one without taking off the carbs. From the look of the gasket, its all one piece and would think I would need to replace the entire gasket if I chose to just replace the header?

I have my eye on the Monza header and over/under exhaust system that matches it. Its all aluminized so it should be good to go with rust.

As you can see my old exhaust is rather.. um... oxidized to be nice..

[BRE-240Z]

I don't think you have to remove the headers. Isn't there an adapter that will get you down to 2.5"? I think that I've seen one on the MSA site, although it seems to me that one could be fabbed up pretty easily.

But if you can lay your hands on the adapter, then you could just have your exhaust guy replace everything from the collector back.....

Edited September 5, 2008 by BRE-240Z

[doradox]

Not if you want to change the gasket which would be VERY highly recommended.

Steve

[Arne]

1.) Yes, to replace the gasket (whenever either manifold is removed), both intake and exhaust needs to come off.

2.) If the header you have is already coated, why replace it? Any competent exhaust shop will be able to neck down to a smaller diameter pipe. No need to replace the header for that.

[xray]

My memory may be going, but I don't recall MSA offering a 6-1 header with a 3" outlet. Currently IIRC they all go to a 2.5" outlet and include an adapter to accept a 2.25" exhaust if needed. Of course, it could be a different manufacturer or an older version of their current header (pre 2004) then I would be ignorant of what their offering was....

BTW, once you've been to 6k with a nice exhaust, cam and some other goodies, you'll go back for more pretty often. Like every time you drive it. Trust me, I know....

[Zedyone_kenobi]

Well, no argument there, no the revs, but 3" is overkill if you ask me. Plus the current exhaust looks rather bad. I am with Arne on this one. the PO had the foresight to get the header jet hot coated. I would hate to not use it. Seems like a whole bunch of work to replace a perfectly good header. I agree, that a good shop should be able to fab up just the back end of the exhaust. I think that will be my direction.. Plus it will save me 450 bucks on a new header.

[d240zx2]

When you get her to the track, Stephen, you'll wonder why you ever keep it under 6K on the street! :laugh:

[Zedyone_kenobi]

Looking forward to those days Frank.

Hope to get her put back together by end of October. Nice driving weather in October

[biddljj]

After two years of body shop hell...... Today I finally got to hear my 240Z L24

with the Monza exhaust + Arizona Z header...... sweet

Much easier on the head than open headers but still has a ballsy tone.....

Not just a Z - zdisease

[Zedyone_kenobi]

UPDATE:

my exhaust is now fully planned out. I am purchasing an ANSA tip from WingZr0 this week and will be keeping my stock header. I will have a new aluminized pipe run from the header to the ANSA. I may or may not put a resonator in there, not sure if its needed. But should have that done in a couple of weeks.

[d240zx2]

That'll be nice to hear, Stephen. Maybe we can compare notes...

Frank

[d240zx2]

As in exhaust notes....