Rockford Fosgate TMS69BL9813 6"x9" Full-Range Saddlebag Audio Kit for 1998-2013 Harley-Davidson Motorcycles (TMS69BL9813) Hertz SX165NEO you should use one 3"

you should use one 3" diameter x 11" long port with a 0

You'll find yourself immersed in the audio like never before

and audio receivers

making long journeys more enjoyable

Rockford Fosgate TMS69BL9813 6"x9" Full-Range Saddlebag Audio Kit for 1998-2013 Harley-Davidson Motorcycles (TMS69BL9813) Hertz SX165NEO you should use one 3"Rockford Fosgate TMS69BL9813 6"x9" Full Range Saddlebag Audio Kit for 1998 2013 Harley Davidson Motorcycles Retrofit kit allows addition of rear speakers on your existing factory bag lids and plug directly into a Rockford Fosgate front audio kit that utilizes the Power TM400X4ad 4 channel amplifier. Eliminates need to paint and color match. Not designed for factory amplifiers. Refer to our COMPATIBILITY chart at the bottom of the page to verify