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Discussion Starter · #1 · (Edited)
Recently, there have been a couple of poor attempts at copying our AMS cast widemouth design. A lot of honest people are being duped by receiving a seemingly lower cost item, but in the end could pay even more in replacements and labor time.


It’s for this reason that we wanted to shed some light on the positive attributes of our pipe vs. the competition.


This post only pertains to the downpipes pictured. We are sure there are other quality units out there, but these two are copies (albeit bad ones) of the AMS piece. We are only comparing one of the competitors units because the two non-AMS copies are identical to each other.


We understand that at $469.95, our downpipe is one of the most expensive on the market…. We have also proven that it’s the best made and most well designed through our rigorous testing and results.


The largest and most obvious difference in our pipe vs. the copy pipe is the fact that our pieces are 100% cast as they join to the flex section. Both AMS ends are cast because it provides unmatched performance, reliability and strength. Could we have cut down on costs by making it like the copy pipe? Sure, but we would be cutting corners resulting in a poorly designed pipe providing inferior results. We pride ourselves on providing the best product possible to our customers!





Now let’s take a peek at the Internals…


The first thing we’ll look at is the bellmouth section as it mates to the flex section. Our AMS bellmouth is one entire cast piece to not only provide strength, but more importantly ensure cleaner and smoother transitions for the exhaust gasses to follow. The taper we designed allows the gasses to cool and accelerate as they enter the flex section.






The competition took an inferior approach. Rather than spending the extra costs to completely cast the bellmouth section, they decided to slip a pipe into the mouth and weld it to keep costs down. This was a bad choice as they added another weld which greatly compromises strength on a part that has to endure extreme heat and stress. The biggest issue is the fact that the welded pipe protrudes ½” past the opening of the bell mouth. This in turn creates a nice deep groove around the circumference of the pipe that catches exhaust flow and results in greatly unwanted turbulence, back pressure and heat. The lip is so deep, it holds over a 1/2 cup of water!!!





Let’s move downstream to the exit of the pipe. The AMS unit utilizes a full-cast lower section to provide the ultimate exhaust flow and strength that we talked about earlier.




The competition again took an inferior approach. They decided that stainless steel tubing was the best route to keep costs down and avoid casting. This could have been a viable solution, but they threw in another curve ball for exhaust flow… They left the O2 bungs sticking up into the exhaust stream! Now the exhaust gas is fighting the massive lip up before the flex and has to move over more raised areas after the fact, creating even more turbulence and heat!



Next we’ll take a close look at the bosses / bungs on the two downpipes. AMS engineers designed a prototype heat shield to be used with our downpipe. This product never came to fruition as we discovered a shield was not necessary. We did however keep it in our casting in case we wanted to utilize it at a later time or if heat ever became an issue. As of right now, those bungs are not functional on the AMS unit at all.


The competition somehow decided they needed to take the same exact approach as the AMS pipe for the bungs! The issue is that they copied a feature for a part that doesn’t even exist! They copied our EXACT BUNG PLACEMENT! We’re guessing they just assumed it was a functional feature and it wasn’t expensive to incorporate. Another possibility is they assumed it was for the factory shield and never realized it because they never even tested their product. Or maybe… JUST MAYBE, they planned on copying our heat shield if that ever made its way to the market. I guess we’ll never know….




The last point we want to make is the labor/installation side of things; this is a topic many do not consider when purchasing a product. Anyone who has installed an EVO X downpipe can tell you it’s not something you want to do twice. I’m sure many of you have heard the phrase, “Do it right, or do it twice”


We can tell you with absolute confidence; our parts are designed to perform the absolute best for the life of your vehicle!


In closing, yes our downpipe has a price premium over some of these competitor versions. As we’ve explained above, there is a reason for it: We spend more and invest more making our piece so it works the absolute best, makes the most power and is worry free for the life of the car!

We know that money in this day and age can be tight for anyone. All we ask is that you really look at the big picture before making a purchase. A few dollars saved now can turn into hundreds lost down the road doing things right the SECOND time.
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To read more about our widemouth downpipe please view our site and click the link following:

http://www.amsperformance.com/cart/AMS-Mitsubishi-Lancer-Evolution-Evo-X-Widemouth-Downpipe.html

Thank you and as always feel free to ask if you have ANY questions.

Eric Gaudi
Sales Manager
AMS Performance
 

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Hang them all....
 

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That's hilarious that they copied the heat shield provisions. I don't run this myself, currently using dump to atmosphere, but I have seen one in person and it is a great unit.
 

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Well said. I saw this other downpipe pop up recently, and thought 'wow looks like they used the AMS downpipe for their casting mold! how cheesy is that?'. Didn't look too much farther, but it sounds pretty conclusive now! What a shame....

Were you able to tell if they also used 304 Stainless for the cast and their connecting tube? I was wondering about the welds if they were trying to fuse different alloys. That seems like the worst possible place to introduce a weld... not just from an airflow perspective, but from a thermal view. Especially with the lip! Using a cast section before the flexpipe is perfect since it'll resist deforming at super high exhaust temps. I just cant fathom why anyone would go through the trouble of casting only part of the section before the flex pipe then welding in tubing. *facepalm* It's like taking all the risk associated with welding together a tubular header, but all the trouble of setting up a molding and casting process to cast it, all in one job. why on earth would you do that?
 

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I just cant fathom why anyone would go through the trouble of casting only part of the section before the flex pipe then welding in tubing. *facepalm* It's like taking all the risk associated with welding together a tubular header, but all the trouble of setting up a molding and casting process to cast it, all in one job. why on earth would you do that?
Easy answer, because the casting on the AMS piece requires a lot of up front money for engineering and manufacturing. Easier to pay for cheap labor somewhere and actually spend more time awkwardly fabricating pieces than to invest in a good design up front.

That's the state of the world these days in terms of products and manufacturing, makes me sick.
 

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Biggest thing about AMS.... It's fn AMERICAN!

Flame suit donned(I drive an evo)

But seriously the Older and more wiser I get, the more I think everyone in this country needs to support the businesses in this country. Especially the legit ones, like AMS!
 

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right, but the knockoff still had to build the mold and commission the casting. That's most of the effort. If you're going through that much trouble anyway, then why not just create the mold and cast down to the flex pipe? Only thing I can think of is that whoever was pouring the casts had a size limitation
 

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Either a size limitation, or by doing a full cast product, it would look enough like the AMS to warrant a lawsuit.
 

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Either a size limitation, or by doing a full cast product, it would look enough like the AMS to warrant a lawsuit.
It's probably not worth it.

Anyway the people who buy knockoff parts are from a different market segment with different price point. It's like the Rota vs Volk argument kind of. You can say Volk sales are being cut into by Rota look-a-likes, but a person who wants to spend $1000 vs $4000 on wheels would not buy Volks to begin with.
 

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Discussion Starter · #20 ·
I'm not sure on the grade of stainless on the tubing but I can tell you the grade of steel on the flex is very poor. If you put a magnet up to it there is a decent amount of resistance where as on the AMS piece there is none. I don't anticipate their flex sections will last very long compared to ours.

Eric
 
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