Pipercross K-jet induction kit???

[Stiggy_21]

does anyone know what the pipercross PK056 K-jet induction kits are like? they are for a pre-89 k-jet 16v and are supposed to be 30% more efficient then standard panel filters.... anyone got one?
[URL="http://www.pipercross.net/fastroad/product.asp?m1=47&m2=164&app=478"]

thanks