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Old 06-30-2010, 01:58 PM   #1
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Default Silverado Magnaflow system chopped up for Miata

So in my quest for more power I realize I need to dump the stock exhaust. I have little budget left in the Miata and finding a used 3" system is very rare, and then shipping to Canada is $$$$.

What I did find is this Magnaflow Truck sytem used for sale cheap locally and it includes the 5 x 11 x 22 Magnaflow:

http://www.magnaflow.com/02product/s...ne=all&id=1731





I can get the whole thing for about $50 more than the cost of the 5 x 11 x 22 by itself. It looks like I may be able to use most of it to make a DP back muffler.

I can't weld very good so I may cut it up and get a shop to put it back together. I have access to a welder but still not sure plus a shop will be so much faster just don't know if they like the idea of a guy with a box of parts that says - "make this stuff go on this car good".

I think I still need a flange or 2 and maybe a U-turn piece.


This is right inline with the cheap but properly functional principle than runs rampant here, at least I think so.

Any thoughts on the bends and if this system will accomodate most of the ones an NB needs ? I also have a hitch and am a little worried that the 5 x 11 x 22 may interfere?
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Old 06-30-2010, 02:11 PM   #2
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baffles no bueno for turbo.
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Old 06-30-2010, 02:15 PM   #3
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Shouldn't that 5 x 11 x 22 Mgnaflow be straight through as all their mufflers ?
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Old 06-30-2010, 02:28 PM   #4
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Quote:
Originally Posted by Landrew View Post
Shouldn't that 5 x 11 x 22 Mgnaflow be straight through as all their mufflers ?
Yes, Magnaflow > Chokemaster.

Straight-through perforated core stainless steel on all the mufflers I've ever seen from them.
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Old 06-30-2010, 02:31 PM   #5
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why not just find a local exhaust shop to make u an exhaust for like 200$
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Old 06-30-2010, 02:44 PM   #6
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Quote:
Originally Posted by Pen2_the_penguin View Post
baffles no bueno for turbo.
I meant the Magnaflow has no baffles.

Last edited by Landrew; 06-30-2010 at 03:12 PM.
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Old 06-30-2010, 02:48 PM   #7
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Quote:
Originally Posted by magnamx-5 View Post
why not just find a local exhaust shop to make u an exhaust for like 200$

Not in Canada, ha
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Old 06-30-2010, 02:54 PM   #8
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Magnaflows don't have baffles. You're good. Don't know if you're covered with the piping.
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Old 06-30-2010, 02:57 PM   #9
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I fabbed mine up by hand using purchased bends and u-clamps..and it looks like you should have what you need there, depending on the length of the straight section.

Only thing is when you start cutting it will have to be rewelded back up, and probably need a flange or two, so your cost is back up to something custom.
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Old 06-30-2010, 03:07 PM   #10
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magnaflows have no baffles? sweet news to my eyes! I had a learned experiance.
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Old 06-30-2010, 03:14 PM   #11
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Here a custom in aluminized is about $500.

I should really learn how to weld as I also just found out my flex section is leaking
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Old 06-30-2010, 03:36 PM   #12
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this is how mine worked.
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Old 06-30-2010, 03:39 PM   #13
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Thanks,

I have your thread and Y8S's as well as pictures from them saved to my computer for reference already. Ill keep these as well



I've been debating a while the cheapest route and I think what I have planned may work.
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Old 06-30-2010, 06:06 PM   #14
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What I would really like to do is have one of you guys build me one or sell me one of your used ones. Problem is shipping has to be factored in. I know there are some people here setup to build and sell and I don't want to hurt their business. But others who have done it once or twice if I could get one to my door aluminized with the big Magnaflow in Canada for around $400 Canadian that would be great.
pm me if you think that is possible?
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