Best Exhaust For Honda 400ex

Peter | 27-12-2025

If you aren’t someone who makes frequent purchases, selecting the best Best Exhaust For Honda 400ex won’t be an easy chore for you. However, you shouldn’t be concerned because we have provided you with the most comprehensive list possible of the top Best Exhaust For Honda 400ex. Have a look at the products on our list, and pick the ones that appeal to you the most.

We researched and tested Best Exhaust For Honda 400ex in the market to get you this list. Our most recommended product is Lexx Best Exhaust For Honda 400ex. Check out our picks for all of our favorites, and be sure to read our buying guide to get all the information you need to make the best choice!

Editor's Choice
Lexx MXe Slip-On Silencer With Mid-Pipe Compatible with Honda TRX 400EX, TRX 400X
Lexx MXe Slip-On Silencer With Mid-Pipe Compatible with Honda TRX 400EX, TRX 400X
Premium Pick
Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400
Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400
Budget Pick
Ex-Pipe W/Sealing Gasket FITS HONDA SPORTRAX 400Ex 2x4 2001-2008
Ex-Pipe W/Sealing Gasket FITS HONDA SPORTRAX 400Ex 2x4 2001-2008

Top 10 Best Exhaust For Honda 400ex

We researched and compared the top products in the Best Exhaust For Honda 400ex category to provide you with these recommendations.

1. Lexx MXe Slip-On Silencer With Mid-Pipe Compatible with Honda TRX 400EX, TRX 400X

  • Fits Multiple Models - See Fitment Guide Image for Fitment
  • Fully tunable exhaust system allows the user to change from a race exhaust (46mm Race Tip) to a forest friendly silencer (Quiet Core Insert) with just three bolts
  • Engineered to improve torque and acceleration with an increase of up to 4 horsepower on some machines
  • Lightweight design saves up to 3.5 lbs. over the stock exhaust
  • Included 46mm Race Tip for closed course competition
  • Non-CARB Compliant

2. Muffler W/SEAL FITS HONDA SPORTRAX 400Ex 2x4 2001-2008

Muffler W/SEAL FITS HONDA SPORTRAX 400Ex 2x4 2001-2008
8.3

Kumar Bros Usa

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  • Includes: 1 x Muffler (Replaces OEM part No. 18300-HN1-000, 18300-HN1-A70 ) 2 x Sealing Gasket (Replaces OEM part No.18291-216-000, 18291-KE5-000, 18291-MN5-650, 18291-MN9-000)
  • Replaces Part Number : 18300-HN1-000, 18300-HN1-A70, 18392-Mk4-000, 18391-383-670, 18391-317-010
  • Compatible Model : SPORTRAX 400Ex 2x4 2001-2008
  • Offer is for Replacement Muffler on the above Models
  • Kumar Bros USA sells Aftermarket parts designed to fit Above equipment

3. Muffler/PIPE/Dampener/SEAL FITS HONDA SPORTRAX 400Ex 2x4 2001-2008

Muffler/PIPE/Dampener/SEAL FITS HONDA SPORTRAX 400Ex 2x4 2001-2008
8

Kumar Bros Usa

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  • Includes: 1 x Muffler 1 x Muffler Gasket Seal 1 x Clamp 2 x Dampener W/Hardware 1 x Pipe 2 x Sealing Gasket 2 x Pipe Mounting Nuts
  • Offer is for Replacement Muffler on the above Models
  • Kumar Bros USA sells Aftermarket parts designed to fit Above equipment

4. Ex-Pipe W/Sealing Gasket FITS HONDA SPORTRAX 400Ex 2x4 2001-2008

Ex-Pipe W/Sealing Gasket FITS HONDA SPORTRAX 400Ex 2x4 2001-2008
8.5

Kumar Bros Usa

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  • Includes: 1 x Exhaust Pipe (Replaces OEM part No.18320-HN1-000, 18321-HN1-A70 ) 2 x Exhaust Sealing Gasket (Replaces OEM part No.18291-216-000, 18291-KE5-000, 18291-MN5-650, 18291-MN9-000)
  • Replaces Part Number: 18291-216-000, 18291-KE5-000, 18291-MN5-650, 18291-MN9-000, 18320-HN1-000, 18321-HN1-A70
  • Offer is for Replacement Muffler on the above Models
  • Kumar Bros USA sells Aftermarket parts designed to fit Above equipment

5. Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400

Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400
8.7

Moto1988

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  • Compatible Models:For Honda XR400R 1996-2004 TRX400EX 1999-2008 TRX400X 2009 2012-2014
  • Manufacturer Part: 12100-KCY-670
  • Package: 1x Cylinder1x Piston1x Piston Ring kit4x Gasket1x Spark Plug1x Intake and Exhaust Valve Seal Spring Kit
  • Tips before Purchase: Please carefully check whether your model is applicable to our products before buying. You can refer to the applicable models, pictures and OEM numbers on our page to help you determine your choice.
  • After-Sales Service: If you have any questions about our products during the use or purchase process, you can contact us by Email at any time. Every product purchased from us comes with 24-hour friendly customer service and 1 year product service

6. 400EX Air Filter Replace #17211-HN1-000 HA-4099,Compatible With Honda TRX400EX Sportrax 1999-2008,

400EX Air Filter Replace #17211-HN1-000 HA-4099,Compatible With Honda TRX400EX Sportrax 1999-2008,
8.5

Minstar

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  • Replacement Part Number Replace NO.17211-HN1-000 HA-4099. Please Use Amazon's Part Finder Function To Confirm If This Air Filter Will Fit Your Vehicle Before Purchase!
  • FIT FORThis Air Filter Compatible With Honda TRX400EX Sportrax 1999-2008, TRX400X 2009-2014.
  • WorthDirty Air Is Not Only Robs Power But Can Drastically Shorten The Life of Your Engine, Or Worse Yet, Cause Major Engine Damage. This Air Filter Are Engineered Specifically For Your Engine.Excellent Filtration, Provide High Performance Filter Free of Debris Dirt And Water.
  • High PerformanceOur Air Filter Designed And Manufactured Higher Than The Quality Standard of OEM.We Promise That Any Product Sold Are Original High Quality
  • After-Sales ServiceIf you have any question, please feel free to email us, We offer 24h service

7. Big Gun Exhaust 07-1272 ECO Utility Silver Slip On Exhaust for Honda

Big Gun Exhaust 07-1272 ECO Utility Silver Slip On Exhaust for Honda
7.7

Big Gun Exhaust

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  • Lightweight

8. Caltric Exhaust Pipe Outlet Spark Arrester Compatible with Honda Trx400 Ex Sportrax 400 2X4

  • Order Includes: 1 x Exhaust Pipe Outlet Spark Arrester
  • Compatible With Honda: Trx400ex Sportrax 400 2x4 1999-2008, Trx400x 2x4 2009-2014
  • Part Numbers: 18317-HN1-A70, 18317-HN1-000
  • Dimensions: Length: 138.3 mm - 5.4 in, Width: 118 mm - 4.6 in, Height: 118 mm - 4.6 in
  • We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced.

9. Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2x4 1999-2014

Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2x4 1999-2014
7.9

Moto1988

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  • Compatible Models: For HONDA Sportrax 400 TRX400EX 2x4 1999-2008 TRX400X 2x4 2009 2012-2014 Dirt Bike XR400R 1996-2004.
  • OEM Part Number: 14721-KCY-670
  • Package: Intake Valves *2; Exhaust Valves*2; Inner Springs *4; Outer Springs *4; Valve Spring Seats *4; Valve Cotters*8; Valve oil seal *4.
  • Tips before Purchase: Please carefully check whether your model is applicable to our products before buying. You can refer to the applicable models, pictures and OEM numbers on our page to help you determine your choice.
  • After-Sales Service: If you have any questions about our products during the use and purchase process, you can contact us by email at any time, we will try our best to solve the problem for you, and we will provide comprehensive quality assurance for our products.

10. Ex-PIPE/Gasket/SEAL/Clamp FITS HONDA SPORTRAX 400Ex 2x4 2001-2008

Ex-PIPE/Gasket/SEAL/Clamp FITS HONDA SPORTRAX 400Ex 2x4 2001-2008
7.7

Kumar Bros Usa

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  • Includes: 1 x Exhaust Pipe 2 x Exhaust Sealing Gasket 1 x Clamp 1 x Muffler Gasket 2 x Exhaust Pipe Mounting Nuts
  • Replaces Part Number: 18320-HN1-000, 18321-HN1-A70, 18291-216-000, 18291-KE5-000, 18291-MN5-650, 18291-MN9-000, 18373-MR5-000, 18392-HN1-A20, 90301-HM8-000
  • Offer is for Replacement Muffler on the above Models
  • Kumar Bros USA sells Aftermarket parts designed to fit Above equipment

Peter

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