correct id hoses... but you might not even be able to find such a thing. basically i was told by someone that had a type s, that when they swatpped from his brother's car that had autozone lines, to his car that had stock lines the flutter would be and cease to be respectively.

 

i have a crushed 1G and the only flutter i get is in 5th gear at about 10 psi letting off the gas easy. if i let off fast no flutter at all. it is very minor fluttering, you just hear it slightely and dont feel it at all, and like i said it only happens in 5th gear. i,ve used 4 or 5 different bov,s between my 03 and my IX and this is the best one i,ve used as far as like stock driveability. it idles smooth as glass and holds the boost i,m running no problem,20-21 psi tappering to 19 at redline. i dont plan on running higher boost so this is the perfect valve for me. i highly recommend it to anyone who isnt running anything above 24 psi or so.

 

I have an APS, and at higher elevations it flutters.