PRO CIRCUIT T-4 Exhaust System TRX90X 1993-2009 4QH90090 O2 Sensor Bung Adapter 4" muffler body uses a

4" muffler body uses a cooling chamber with proprietary technology to prevent blueing

If you are using your motorcycle on a closed course (racing

2016-2017 Harley-Davidson Fat Boy S FLSTFBS - - 2010-2016 Harley-Davidson Fat Boy Lo FLSTFB - - 2007-2017 Harley-Davidson Softail Fat Boy EFI FLSTFI - - 2007-2010 Harley-Davidson Softail Custom EFI FXSTC - - 2006-2009 Harley-Davidson Softail Night Train EFI FXSTBI - - 2006-2007 Harley-Davidson Softail Standard EFI FXSTI - - 2006 Harley-Davidson Softail Standard FXST - - 2006 Harley-Davidson Softail Night Train FXSTB - -

Pressure plates are CNC-precision machined from 6061 T-6 billet aluminum

Requires drilling and tapping swingarm bottom for installation

PRO CIRCUIT T-4 Exhaust System TRX90X 1993-2009 4QH90090 O2 Sensor Bung Adapter 4" muffler body uses aImproved power deliver and exhaust note Body is made from lightweight 6061 T 6 brushed aluminum and the end cap and intake tube are stainless steel Tunable end caps allow for fine tuning of power delivery for different types of riding and terrain Steel allen head screws make repacking an easy task Exclusive E glass pillow packing (extra packing included) 2009 Honda TRX90X 2007 2008 Honda TRX90EX 2002 2006 Honda TRX90 Sportrax 1993 2001 Honda TRX90