Fantastic upgrade and good customer service! We put this on the '02 Aero and '03 Aero. Sounds great and you can hear the bypass valve relieve. Both Aeros have the piston bypass valve.

Performance: Very noticeable, even in the regular mode, in the sport mode acceleration jerks you back on the seat.

On the '02 Aero we removed the wheel and peeled the fender back etc., however on the '03 Aero I turned the wheel outwards and could peel the fender, remove the airbox and fit the filter in. We also covered the entire bottom with a transparent plexiglass plate, bolted at the front and back.

Rating: [5 of 5 Stars!]