This stainless steel sports exhaust system adds a fuller & more powerful sound to your Boxster. The distinctive tail-pipe design & bypass pipes echo the classic sebring exhaust while enhancing the striking rear looks of your Boxster. The sound is pleasant & mellow at idle & low rpms: as rpms increase more exhaust is channelled to the bypass pipes thus providing an increasingly sharper & more aggressive tone. At just under 5k rpm through redline it is in full bypass mode giving an exciting sound similar to the club sport cars. The sound is managed by an electical/vacuum control system allowing you to operate in stealth through the neighborhood yet providing that unmistakable pure Porsche sound as you power through your favorite twisties. Fits all years 2.5l & 2.7l Boxster & Boxster s up through production date 07-2002. Additional hardware kit needed for 2.5l (part number g00004420011).