got this from there website. and saw this in the jegs catalog.

The VR velocity stack was designed to reshape the factory throttle-body in order to boost air flow velocity at each given RPM. The overall shape of each VR velocity stack has undergone some of the most intensive airflow research that we have ever done to produce the best overall shape for each engine's airflow requirements.

In order to achieve this we:
Created a balanced airsteem between the upper and lower portion of the throttle-body blade = more airflow. We then changed the shape of the entrance to build up a higher velocity charge at each given RPM. This allows the intake charge force in the manifold to be increased = increased throttle response and added torque and power under the curve where you can use it. Streamlining the intake was also achieved by directing the air in a controlled fashion to reduce any power robbing turbulence over the AIR and PCV valve to maximize the overall efficiency of the factory throttle-body's overall diameter. Each velocity stack features a varied plenum volume whether in front of the throttle-body or in overall length to help them boost the primary and secondary pressure waves during the cylinder firing process = a tuned and more balanced induction system giving you much better overall combustion efficency = more power and better gas milage.

Designed to produce power and torque throughout the RPM range, Increases throttle response, Increases gas mileage, Increases acceleration, Installs in just minutes, A patent-pending design, Eliminates the need for a ported throttle-body by smoothing and reshaping the throttle-body entrance to increase the incoming air velocity at each given RPM

NOW AVAILABLE FOR

1997-2004 C5 Corvettes
1998-2002 LS1 F-Bodies
1996-2006 GM V6 Trucks/SUVs
1996-2006 GM V8 Trucks/SUVs


In Truck applications we have seen gains of up to 22+ ft/lbs of tire-shredding torque throughout the power curve where you can use it! As tested in a 2004 Silverado 5.3 V8. In LS1 car applications, gains of up to 13 rear wheel HP have been seen (03 C5 Corvette).

 

whatever it is, it doesnt work, It will impede airflow. I dont even need a picture to tell you that.

 

ill have to agree judging from the description.

 

In addition to hurting airflow, I remember seeing some posts a while back about the thing melting in their throttle body. Try a search and I'm sure you'll come up with something.

 

it is a piece of crap, just P&P you TB yourself and save the money

 

Stay far away from that crap man. Your $$$ is better spent else where.

 

A buddy of mine put one in his Z06 ..dunno why. Another vote for porting the TB.

 

Here's proof it doesn't work, borrowed my friend velocity stack thing at the 1/8 mile track. Run w/o it was like a 8.60 with a 2.0 60 foot. Run with it was like a 8.80 with the same 60 foot. Car had time to cool down and everything. I've never run that slow in the car before, always 8.60's and below. So take that how you want it, but after that night, my friend never put it back in his car. Tim.

 

thanks thats all i need to know !

 

I had one in my car, similar mods, didnt do ****. Wouldnt say it slowed me down, but no real gains. I did put in my buddys truck, and he says he feels it down low....