My next upgrade for my car is a 1G head with brian crower 280's and a SMIM. I was thinking on buying the Magnus one for $650 but then i fell in love with the AMS $850 one.
I think its a lot of money for an intake manifold and then i have to spend over $250 more for a 3in t/b so its over $1K for the manofold setup only. Is the AMS $200 diference workth over the magnus? They both says that you could get 40whp on these, i know every car and every setup is different but looks like they give the same results

Even though I don't like AMS in any way, I do admit this is one of the best designs of a SMIM. The plenum is much larger than the Magnus and the runners have a good tapper to them. I know many people that have made substantial gains with this SMIM and I have seen people trade up from other SMIMs. I plan on going with the DV/DT Fab one myself witch shares design similarities with the AMS VSR but has some refinements.dvdtfab.com

Yeah i like the DVDT fab one better but i tried to contact him for a quote but never recived any reply from him

I like the DV/DT one, but i'm JMF all the way.

I have a Magnus on my car, I like it alot. My buddy has the AMS VSR on his car, I like it better... I would def. say that is a more of a race orentated manifold... with its HUGE ass plenum. I doubt that AMS VSR will crack though. You will very happy with whatever you get, get one of them and dont look back.

I agree completely. I have heard some stories about the Magnus cracking and not making power even without cracking but ultimatly it's your decision. By the way, square manifolds are not as good as a rounded one of the same size. Corners are never good for airflow. The DVDT one that is pictured in the web site is not the current one being made. JeanDSM, do you want me to call Albert for you?

Slow99x said:

I agree completely. I have heard some stories about the Magnus cracking and not making power even without cracking but ultimatly it's your decision. By the way, square manifolds are not as good as a rounded one of the same size. Corners are never good for airflow. The DVDT one that is pictured in the web site is not the current one being made. JeanDSM, do you want me to call Albert for you?

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Yeah please try to contact him for me, i tried a few months ago cus i wanted his cold air intake, but never recived nothing back from him, maybe he is too busy but dam he makes the best fab and custom parts for DSM period. Please try to contact him.

Imo there are much better options then ams manifold or magnus price vs performance wise, you just have to look around. Here is one that was made for me, this thing is a monster in person and it will never crack the briged velocity stacks are the best design imo and the flange is super thick heres some pics.

I'd like to see some number comparisons between these. Any more info on the Driven Innovations part?

JWoodley said:

I'd like to see some number comparisons between these. Any more info on the Driven Innovations part?

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Here is alittle more info on the driven innovations i/m taken from the designer
-Runners are 6 inches long and the plenum is 300ci.
-The thickness of the plenum and the runners are 1/8 inch.
-All flanges are 1 inch thick 6061 t6 aluminum and are all CNC'ed.
-To add to this the manifold was made for power and quality, the figment of it is tight one but no real modifications are needed. For example you will have to rotate your TPS sensor 180*.


There are many different aspects of my manifold that are better than the competitors. No matter whose manifold you use it will make horsepower simply because of the bigger plenum. That’s what companies do make a plenum with 4 runners and they are done. It takes them less than $50 in material plus welding to make just think about it… These companies are making a beating selling them. They are simple and there is no engineering involved. I did my research and spend countless hours testing. Now back to the DI manifold, it has velocity stacks, which increase the velocity and are raised to restrict the flow and create an even pressure in the plenum for all 4 runners. Now the runners are the most important part of the design that’s where the torque and power band can be adjusted. DI runners have the shape of the head intake ports, this shape doesn’t disturb the flow, unlike the round ones where they go from round to square, this gives the ability to adjust the taper and increase velocity even more. On the length of the runners we are very limited by the space between the firewall and the engine, but I was still able to make them 6 inches long. The plenum size is designed with bigger turbo in mind. There are no square edges in the manifold, this lets the engine use all of the available air in the manifold (No dead air spots) and makes it extremely strong.
All of those variables were put together in my manifold and it’s designed to make most power and still keep the street driving abilities.
The quality of DI Manifold is UNMACHED, it features 1 Inch thick flanges and 1/8 inch thick sheet aluminum. So no worries about manifold expanding under pressure.
This is the best manifold out there for the price !!!

hks-gst said:

This is the best manifold out there for the price !!!

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How much and where can we find it?

I too am very interested in the DI, get us a link or something.

JWoodley said:

How much and where can we find it?

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The price is same as a magnus 650$ If you are really intrested I can give you the phone number or email to the guy that made it for me.

I have been in contact with Albert (DVDTfab). He is currently in talks with various machine shops for parts to get back to SMIM fabbing.

hks-gst said:

the briged velocity stacks are the best design imo and the flange is super thick heres some pics.

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Take a fluids class and then come back here with that same opinion. There is a reason I am ditching my magnus (and it's not cracked).

Boosted98gsx said:

Take a fluids class and then come back here with that same opinion. There is a reason I am ditching my magnus (and it's not cracked).

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Can you help some one that doesn't have 12 weeks for said class understand why bridged velocity stacks are not ideal? Or why velocity stacks in general are bad?


AMS, Magnus, DV/DT (engineering major who has taken that class), and JM Fab use these things too

Boosted98gsx said:

I have been in contact with Albert (DVDTfab). He is currently in talks with various machine shops for parts to get back to SMIM fabbing.

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I asked him about a manifold a while back also, no reply.


PS, sweet front mount

definitiveno said:

Can you help some one that doesn't have 12 weeks for said class understand why bridged velocity stacks are not ideal? Or why velocity stacks in general are bad?


AMS, Magnus, DV/DT (engineering major who has taken that class), and JM Fab use these things too

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Not the stacks, the stacks are okay, it's the tapered manifold.

Boosted98gsx said:

I have been in contact with Albert (DVDTfab). He is currently in talks with various machine shops for parts to get back to SMIM fabbing.



Take a fluids class and then come back here with that same opinion. There is a reason I am ditching my magnus (and it's not cracked).

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Please explain your theory? and what manifold is it your switching to?

Boosted98gsx said:

Not the stacks, the stacks are okay, it's the tapered manifold.

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Have you looked at the displacement on this manifold yet though? Not to say the slant doesn't have an affect but the biggest problem I was ever aware of with the magnus was it's lack of displacement. The slant was also argued to be in place to over come magnus's lack of displacement. Siting that the superior distribution negated the need for a larger interior volume.

It was my understanding they made the plenum tapered to even the airflow between all cylinders. I heard that this was proven on a flow bench???

hks-gst said:

Please explain your theory? and what manifold is it your switching to?

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My guess is the VSR, it's supposed to be the best on the market right now.

funny cus in august i will start my first fluids class, AMS seems like the best design, almost everyone with a SMIM has the Magnus
Is it becuase of the price or is it just the performance as well?

maybe this question hellps this thread

Here are 2 pics of the AMS manifold these are for the Evo i dont have pics for DSM does anyone has?
and one of those jewels made by DVDTFAB

The AMS and the DVDT seem to be very similar is design. In that they both dont have tapered plenums and both use velocity stacks..... Anyone have interior shots of these 2 manifolds? Also going with the AMS you also go with a 3'' throttle body correct? Is this really needed for us mostly street driven guys? And will it hurt us at all? I mean the the largest of turbos im ###### going to see on my dd car is a 3065 and i wont be upgrading my 2.5'' ic pipes and intercooler. So would it make sense to be upgrading to a 3'' tb or not?

snox135 said:

It was my understanding they made the plenum tapered to even the airflow between all cylinders. I heard that this was proven on a flow bench???

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No. That would only hold true in a situation where ALL cylinders were open at the same time. However, our plenums work in a pulse format. The pulses from the cylinders closest to the turbo disrupt the airflow to #1 causing it to run richer from air starvation. The taper only increases this by causing a restriction for the air to reach #1.