Has anyone tested any of these front bumpers to see which one really provides the best aero on a road course here in the states? I know people/shops/teams use them, but done any back to back or wind tunnel type testing?

Spoon
ASM
Amuse
Voltex
J's

Also, anyone know when the Voltex kit is fo sale?

 

The Voltex is probably the best design* out of all the ones you've stated. I don't think they've done wind tunnel testing for the bumper specific to the s2000, but they've done "wind tunnel" testing for the cyber evo and applied what they learned to the design of the s2000 bumper.

Evasive was prototyping the Voltex kit at Buttonwillow CW13. Lap times improved roughly 2 seconds with the addition of the kit. They noted their feedback and sent it to Voltex who revised the kit. The revised prototype should be arriving in the next container, according to Evasive.


There has been much criticism regarding their "tunnel," but it is better than nothing.

*While the ASM kit is well designed and clearly functional, I'm predicting the price for the Voltex kit be a better bang for your buck. It's pretty hard to justify performance to dollar for the ASM pieces.

 

That is what I was hoping to hear.