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campbellcj campbellcj is offline
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Join Date: Aug 1999
Location: Agoura, CA
Posts: 5,773
ITG's flow down through the top, so it sure seems like there should be some difference. In particular in my 914-6, the tops of the filters are right up against the GT-style 'mesh' engine lid to the outside world, whereas the K&N's (with watershield tops) suck air from several inches down into the engine compartment. This factor (which may be totally insignificant) is of course different on the 911 or other configurations.

I have both types of filters, and switched to the K&N watershield setup to cut the noise (ITG's are LOUD) and also to guard against water intake, as unlikely as it is considering where I live and how darn much the car sits in the garage.
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Chris C.
1973 914 "R" (914-6) | track toy
2009 911 Turbo 6-speed (997.1TT) | street weapon
2021 Tesla Model 3 Performance | daily driver
2001 F150 Supercrew 4x4 | hauler

Last edited by campbellcj; 11-08-2005 at 09:07 PM..
Old 11-08-2005, 09:02 PM
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