Performance Aluminum Slip On Muffler For 1999-2014 HONDA TRX400EX USFS APPROVED SPARK ARRESTER

New performance slip on muffler

Increase your power and torque with a simple slip on muffler.

Dyno tested for ultimate air flow and performance.

Dyno results show power numbers on a stock TRX400EX, a TRX400EX with the exhaust on but not tuned and then the exhaust on with proper jetting and tuning done by a professional power sports shop. 

TESTED IN XC & GNCC RACING

TUNING IS HIGHLY RECOMMENDED FOR THIS KIT!

RECOMMENDED JETTING ON STOCK MOTOR:

45 PILOT

145 MAIN

Kit includes:

1x aluminum muffler with USFS approved spark arrester and biggest insert installed

2x different diameter inserts (the smaller the insert the quieter it will be)

1x allan key set

1x flag

1x key chain

1x sticker