If you can't outflow us you will never outrun us!
You thought all intakes were about the same? Not a chance!

At VR we flow test every product in true dynamic, real world and simulated dynamic configurations. We do this to find an induction system's true limitations. This is why we flow every component as it would be installed on the vehicle. This provides the closest representation of real world flow in a controlled environment. We never flow components by themselves because an induction system is just that... a "SYSTEM" not a sub component.

These are flow numbers from some popular brands for the world to see. We flow tested these systems all the way through the cylinder head, because if it does not show up in the head it is simply not there.

Once you see the results, you'll be the judge

The control: From highest flowing systems to the lowest.
For this test we are using a stock LS-3 cylinder head with stock OEM valve, a stock LS-3 intake manifold and throttle body. All of the systems were flow-tested with the air meter in place in their respective locations.

Flow measurement: We are using a Superflow 600 flow bench.

All tests were conducted at 28 inches of water, the SAE standard for flow measurement.
Temp 67 deg F
D.A. = 40ft above sea level
Cylinder #3

All testing conducted independently by USA Racing Engines in Houston, TX
*All testing was conducted in accordance with standards set forth by the SAE

Control Base Line


You can see how much the OEM manifold hurts airflow! (we are fixing this too)


The VR EXCEEDS OEM flow requirements by using a special high flow air-horn/MAF
design that is located directly in front of the throttle body. This location offers the maximum increase
in aerodynamic efficiency for maximum airflow. The new elliptical neck and rifled barrel design offer
phenomenal low Lift/RPM performance that is simply untouchable.


Shrouding was removed for increased flow.


OEM stock air-box, with a GREEN HIGH PERFORMANCE replacement panel filter.

Here is the surprise of the group for all to see. With nothing but a Green High Performance filter
(outflows K&N by 20%) this $65 filter allowed the OEM box to nearly match the best of the
rest for a fraction of their cost and without the heat soak penalties of some of the systems.

We helped this one along by removing their shrouding when installed in the car for max flow performance.


Again we removed the metal shrouding for additional flow.

So how much HP is one CFM per cylinder worth?

Because we are dealing with a known quantity (a stock LS-3)
Calculating HP potential is very straight forward.

For the stock engine if you choose .500 lift value and 272CFM, every CFM on this engine would be worth about .2HP or .2HP per 1CFM/per cylinder. (.2hp = 1CFM per cylinder)

Now simply plug in one of the systems at .500 lift.
System = 10CFM = 10 x .20 = 2.0HP per cylinder.
2.0 x 8 cylinders = 16HP on a stock LS3 over the other intake systems sitting still on a dyno.
Modified engines can see as much as 30-40+hp over other systems!

(We have not gotten to the heat tests yet!)
Check out the Cold Air test

Here is a list of other intakes that did not make it into the
top 5 flow tests even after we tweaked them for added airflow.

(in no particular order)

New Era Performance
Breathless Performance

Don't spend thousands of $$$ and then go cheap on
the intake system! As you can see it will cost you HP
Do it right the first time, buy a VaraRam and
watch the competition in your mirror.
* Test results may vary depending on the flow bench used,test conditions and preparations during the tests.
* Test results may vary in a different environment, however these are the results frim this particular test.