Reviewed By Gary L (Roseville, CA) Reviewed for a 2003 Porsche 911 —8/14/2014 11:15 AM
The instructions supplied needed the visual renderings to be larger..also the schematic of the parts very poor!
Reviewed By Leo D (Bolingbrook, IL) Reviewed for a 1999 Porsche 911 —5/3/2008 5:46 AM
Rather straightforward installation, one does notice a change to performance in the higher rev band. Definitely a change to engine intake noise on cold idle. Sounds like a vacuum, once engine warms it goes back to normal Porsche sound. At speed and higher rev though one can hear the intake once again when the engine opens the throttle. Don't really like the appearance of the alteration to a engineering design. Wish it was alittle less obvious.