Billy Boat or NHP - center muffler bypass
I recently installed a BBE center muffler bypass. Pleased with quality and fitment. Took a couple hours and simple tools. Sound quality is a bit throatier without annoying drone. Overall, very happy!
BB Center
I did a fabspeed intake first, sounded ok. I then added 2" Gundo, which sounded like a broken muffler... I then added Billy Boat Center and that definitely tied everything together - I'd even go as far to say it sounds awesome, especially at WOT
Billy Boat Center Bypass
I have a Targa 4 997.2. Fabspeed Cold Air Induction, Billy Boat Center Bypass, Fabspeed side mufflers. Under 3k rpms - sedate. Over 3k rpms wicked. Not looking back! Love it!
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I did the Gundo hack on my 2009 Carrera S. It made a slight difference but I really didn't like the way it sounded. I then added the Billy Boat center bypass and it sounded awesome!!! I later added the Fabspeed intake. It is perfect to me now. Slight rumble with the windows up. With the windows down it is much louder. When your on it...... it screams!!!!!!!!!
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