Ron, i wrote the article about Jak's car. And if I remember correctly, the pressurized effect in the engine bay takes place because he is running a Porsche style wing that allows air to be forced into the engine compartment.
Jak, if I am wrong about this, please let me know
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WinterJam 2010: Vdub, Surf, Skate & Musis Fest
WinterJam 2010
'I drive way to fast to worry about cholesterol!'
'67 Sunroof Notchback * '68 FI Squareback