Cheaper, but the stem isn't aerodynamic at all.
https://www.ebay.com/itm/Auto-Racing...-/223110277037
No taper or step down, looks to play off of "Box Cavity" effect only.
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George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
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