Just a word of advice, buying stuff off of ebay isn't the best way to go 9 times outa 10. Sure many people will disagree, but you get what you pay for. That intake that your looking at kinda looks like knock off of the magnus one that is proven in our car. It should be sufficient but the welds may break sooner than the real magnus one. No matter what though, you probably would see a gain in horsepower and a lot more top end power. Combine an intake manifold with cams and you would have a good setup.

I can't really answer your question because I've never used that manifold. I can tell you what I think from looking at it. 4x4 square tubing welded to some rectangular tubing welded to a flange. If it was that easy why would Magnus, AMS, BJ's, and many others, even take the time to design their plenums? Answer: Because it's not that easy.

If you are looking for an intake manifold, get something that is PROVEN to make power, not a $200 EBAY special. It's a big expense for a Magnus or AMS manifold, but if you are at the point where you really need it, then it is worth every penny.

If you really want to buy that manifold, I think you could buy the materials and bribe somebody with a 24 pack to weld it up for you and get it all done for under $75

That intake that your looking at kinda looks like knock off of the magnus one that is proven in our car.

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Did you forget your glasses today?

Haha, I didn't say it was exact, I said it was "a Knock Off" of the better manifolds. Why did you waste a post for that anyways, Stay away from Ebay for performance upgrades unless its from a proven company from the DSM Community. Save up more money and get the Magnus one or the AMS one like the above poster stated.

Sorry man I was just kidding. Sometimes my sarcasm gets outta control

Don't worry about it man, this board has many members and a lot of opinions. Thats what makes a good community

Don't get it. It WILL change the way your car runs, it just won't be quite what you are hoping for. Plenum taper, port shapes & taper, are there for well researched & tested reasons. They work. You can not design a manifold like a piece of furniture, its not the same.

That reminds me a little bit of that Bulldog manifold that used to be for sale on Ebay, and the Bulldog company was also out of Minnesota. I wonder if they just went and changed their name. It still has the rectangle shaped runners, and my head still does not have perfect rectangle runners, so I don't see how there will be no smooth transition when the air comes out of the manifold and into the head. I personally would spend the money elsewhere. The JM manifold looks real nice and is still very decently priced.

Notice the way the ebay SMIM is crafted. Just one big rectangular box with 4 runners. Have you looked at the curves in a stock intake manifold? The harsh 90 degree bends in that ebay special would wreak havoc on your intake charge and velocity, not to mention looking ugly under the hood.

Also, does the seller give more detailed pictures? Who knows the quality of the welds. If that manifold is going to see any boost, you'd better hope that those welds will hold.

IMO, don't buy it. $200 would be well spent in other aspects of the car, and if you were to the point that you REALLY needed a SMIM, you'd know that an ebay SMIM is worthless.

Oh, if you really don't want to spend that much for say, a Magnus or AMS, see if you can find a shop to extrude hone your stock manifold. That will give you a huge improvement in flow as well as keeping the stock design for low end torque. Just my $0.02 though.

-Kevin-

you could always look around for a used one, maybe dsmtuners, just a thought.

i got a tubular exhaust manifold from ebay and it went to shit after a couple months it cracked in every place possible

I wouldn't hate on a product most if not all have never used. I personally have that manifold and it works great. Yall all are just stating what you think from how it looks, cant judge a book by its cover. The more expensive isnt ALWAYS better, just because it might look crappy and is cheap doesn't mean that its not good.......

-Logan

GSTdude06 said:

I wouldn't hate on a product most if not all have never used. I personally have that manifold and it works great. Yall all are just stating what you think from how it looks, cant judge a book by its cover. The more expensive isnt ALWAYS better, just because it might look crappy and is cheap doesn't mean that its not good.......

-Logan

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Finally a response that is not heresay. Thanks for speaking up, Logan.

Any more heresay and unsubstantiated opinion will be deleted.

you don't happen to have a picture taken from the flange looking in do you? I'm really wondering what that looks like, and they don't show it in there add. If the holes for the runners are also rectangle on the flange, or if the flange is actually right and is overlapping the rectangle runners.

GSTdude06 said:

I wouldn't hate on a product most if not all have never used. I personally have that manifold and it works great. Yall all are just stating what you think from how it looks, cant judge a book by its cover. The more expensive isnt ALWAYS better, just because it might look crappy and is cheap doesn't mean that its not good.......

-Logan

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Thanks for the first hand report. This manifold looks just like the Dejon Manifold and I have always had good experience with Dejon. How was the install and do you have any pics. How long have you had it on the car and at what boost. I'm wondering how the welds will hold up. Thanks, KC

Dont look just rectangular to me.

Please dont bash a product you have never used. Yall are just going by what other people say and buy the looks of it.

Logan

red eclipse gsx said:

Haha, I didn't say it was exact, I said it was "a Knock Off" of the better manifolds. Why did you waste a post for that anyways, Stay away from Ebay for performance upgrades unless its from a proven company from the DSM Community. Save up more money and get the Magnus one or the AMS one like the above poster stated.

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^^^
He's right

Other ones might be good but yeah, just get a Reputable one. Magnus is on the other end of the city and they back their stuff.

I trust ebay for anything that doesnt' have a performance aspect like my dog's collar or stickers; TOO many people toeting unproven products.

Or you could get it and tell us if it's worth it for that much less dough.

it is worth it

a quote from popular hot rodding magazine feb 2006 pg72:

The purpose of an intake manifold is to distribute air evenly to the intake ports. air first enters through the throttle body or carb and then reaches the plenum before traveling down the intake runners that lead to each individual intake port. while that seems relatively rudimentart in concept, intake manifold design plays an enormous role in determining the shape of horsepower and torque curves, in addition to affecting how much power a motor produces. flow benches are great for measuring the potential flow of cylender heads in a controlled enviroment under ideal circumstances, but impressice flow numbers don't mean squat if there's a mismatched manifold choking the air supply.

So far there haven't been any astounding revelations, just insight into the basic principles of building horsepower that a sheetmetal design incorporates. however perhaps the biggest advantage of a sheetmetal intake is its customizability for specific applications. "People don't understand that an intake manifold is like a camshaft and is infinitely adjustable," says Keith Wilson. "we can alter where the carb, injectors and nitrous nozzles are places and we can also customize the runner length, runner taper, runner volume, plenum shape, and plenum volume."

Engine specs, such as displacement, compression ratio, rpm range, cylender-head flow, carb size, spacer height, and fuel type all influence how a manifold will be built around an engine.

Intakes aren't anything that can be built at home.

This is a picture of the inside of an extrude honed intake manifold from roadraceengineering.com. Notice how the intake runners are still at that 90 degree angle that some poeple claim is so bad? The reason why they can get away with this is because the air becomes turbulent as it rounds that corner, but as it runs down the length of the intake runner it evens out and becomes laminar again. Sure, the rounded ends on the runners help this (especially when the runners are shorter) but it is not an absolute necessity. That is the only noticable difference between the ebay manifold and other popular name brand manifolds aside from the questionable weld quality.

The gains from a change in intake manifold come from reduced friction. This is acheived by increasing the volume of the stilling chamber at the end of the runners, increasing the volume of the runners, shortening the runners, and smoothing out the metal on the inside. The talk about turbulent and laminar flow above is important because friction is drastically increased with turbulent flow.

I am not endorsing this manifold by saying this, only pointing out that just because a big name company makes it does not mean that it took them a load of research and development to come up with the design. I hope you find this information valuable.

-Carter

I'm not arguing that this ebay sheetmetal won't make power, but no one knows where it will make power, or what it will do to your power curve. It could make power from idle-8,000, it could make power from 4000-6000 or i could make power from 3500-3600. my point is that no one knows, and that's a lot of money to "waste" to find out.

I have seen this advertised on e-bay and have wondered about it's performance as well, I personally love e-bay. But am very picky about what I get there as well. What kind of performance gains have you had with it GSTdude06? Have you had it dynoed before and after install?

fr33b1rth said:

I'm not arguing that this ebay sheetmetal won't make power, but no one knows where it will make power, or what it will do to your power curve. It could make power from idle-8,000, it could make power from 4000-6000 or i could make power from 3500-3600. my point is that no one knows, and that's a lot of money to "waste" to find out.

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This is exactly why I started this thread. I was hoping that I could get some first hand experience with this thing. If does not look nearly as nice as a magnus manifold, but if it performs well at all(as a guy on a budget due to a new born this Monday actually), just over 200 isn't that bad to come up with where 600 is. I was once a new DSMer and before I found DSMtuners I used to dream about all sorts of stupid things I found in magazines and even tryed a few items. Now, after owning my car for well over 4 years I'm MUCH more experienced so I do my homework before I buy anything these days. So if anyone has some first hand experience with this thing I'd love to hear it. Even if your just going off of your butt dyno. Otherwise, I'll just keep saving...

me612 said:

That reminds me a little bit of that Bulldog manifold that used to be for sale on Ebay, and the Bulldog company was also out of Minnesota. I wonder if they just went and changed their name. It still has the rectangle shaped runners, and my head still does not have perfect rectangle runners, so I don't see how there will be no smooth transition when the air comes out of the manifold and into the head. I personally would spend the money elsewhere. The JM manifold looks real nice and is still very decently priced.

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Heh, read the description, it says it's made by Bulldog racing