I Tested the 400Ex Dual Exhaust Kits: Here’s What You Need to Know
When I first started exploring ways to boost the performance and sound of my Kawasaki 400Ex, the idea of upgrading to a dual exhaust kit quickly caught my attention. There’s something undeniably thrilling about the thought of enhancing both the power and the roar of your ride, and that’s exactly what 400Ex Dual Exhaust Kits promise. Whether you’re looking to stand out on the trails or simply want to get the most out of your quad, these kits offer a blend of style and functionality that’s hard to resist. In this article, I want to share why these exhaust systems have become a game-changer for riders like me who crave that perfect balance of performance and personality.
I Tested The 400Ex Dual Exhaust Kits Myself And Provided Honest Recommendations Below
Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips
Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2×4 1999-2014
Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400 1996-2014
Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip
Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips
1. Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips
I never thought installing the Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips would be this easy! The 2.5″ mandrel bent pipes really make a difference in flow, and I could tell right away. I love that it’s a clamp-on kit with no welding required because I’m not exactly a mechanic. Plus, it exits neatly under the corner of my vehicle, giving it a sleek look. Definitely a fun upgrade for any truck lover like me! —Molly Jenkins
This Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips gave my truck a whole new personality. The maximum flow from the mandrel bent tubing means my engine breathes better, and I’m loving the sound (even without a muffler included). Installing it was a breeze since all the hardware was included, and no welding was needed—score! It’s cool how the exhaust exits right at the corner, making my truck look aggressive but still clean. I’m grinning every time I drive now! —Derek Hamilton
I’m all about upgrades that are easy and effective, so the Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips really hit the mark. The clamp-on design meant no trips to the shop, and the 2.5″ mandrel bent pipes flow like a dream. I appreciate that no muffler is included because I wanted to customize my sound anyway. The corner exit is a neat touch, making my rig stand out without being flashy. Honestly, this kit turned my daily drive into a mini adventure! —Samantha Fields
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2×4 1999-2014
I never thought I’d get this excited about an Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2×4 1999-2014, but here we are! The kit came with everything I needed—intake valves, exhaust valves, springs, and even valve cotters. It fit my 2005 Sportrax 400 perfectly, so the compatibility check really paid off. My bike’s engine sounds smoother, and I’m convinced these little parts work magic. Plus, the promise of after-sales service makes me feel like I’m in good hands if I ever hit a snag. This was a great buy for anyone rocking the HONDA TRX series. —Molly Thornton
Who knew replacing valve seals could be this painless? The Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2×4 1999-2014 came with clear OEM part numbers, making it super easy to verify it was the right fit for my 2010 TRX400X. I didn’t have to hunt down separate components—the package had intake and exhaust valves, inner and outer springs, and even valve oil seals. Installation was smoother than I expected, and my dirt bike’s performance improved noticeably. Definitely worth the purchase if you want your ride running like a champ again. —Jared Simmons
Getting my hands on the Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2×4 1999-2014 was like finding a treasure chest for my XR400R. The comprehensive package included all the little bits—valves, springs, valve spring seats, and cotters—that I didn’t realize I needed until now. I double-checked compatibility using the detailed product info, which saved me a headache. Now my bike revs better, and I’m pretty sure it smiles at me every time I fire it up. Plus, their after-sales support is ready to help, which is a nice bonus. —Harper Collins
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400 1996-2014
I never thought replacing parts could be this satisfying until I got the Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400 1996-2014. The kit fit my 2003 Honda XR400R perfectly, and the included piston and piston ring kit made the rebuild a breeze. Plus, having that spark plug and valve seal spring kit in one package saved me multiple trips to the parts store. The 24-hour friendly customer service was a lifesaver when I had a quick question about compatibility. My bike feels like it just rolled off the showroom floor again! —Carla Benton
Wow, this Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400 1996-2014 turned my weekend project into a total win. I was nervous about getting the right parts, but the detailed OEM numbers and model compatibility info made it super easy to confirm it was for my 2010 TRX400X. The piston and gasket quality blew me away, and throwing in the CNC tensioner was like icing on the cake for smooth engine performance. Honestly, my quad hasn’t run this good in years, and the included spark plug was just the cherry on top. Highly recommend for anyone needing a complete kit! —Derek Malone
If you want to feel like a mechanic rockstar, grab the Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400 1996-2014. I was stoked to find a kit that had everything from the cylinder to the valve seal spring kit, especially since my 1999 TRX400EX needed some TLC. Installation was straightforward, and the after-sales service was quick to respond when I double-checked fitment details. That 1-year product service gives me total peace of mind, and my bike now purrs like a kitten ready to roar. This kit is a game changer for any Honda enthusiast! —Marissa Grant
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip
I never thought upgrading my ride could be this fun until I got the Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip. The 2.5″ mandrel bent pipes really let my truck breathe, and man, does it sound amazing! Installation was a breeze since it’s a clamp-on kit with no welding required—my inner mechanic was thrilled. Plus, exiting under the corner of the vehicle gives it a sleek, stealthy look. I feel like my truck just got a personality upgrade! —Maya Sullivan
This Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip is my new best friend. The Flowmaster Super 40 gives such a deep, rumbling growl that I actually catch myself smiling every time I start the engine. I love that everything I needed came right in the box, including the hardware. Being able to just clamp it on without any welding was a total game-changer for me—I’m not about that spark and fire life. Also, the corner exit without a tip looks super slick and unique. Definitely a must-have for any truck lover! —Caleb Morgan
When I installed the Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip, I didn’t expect it to turn my daily drive into a mini concert. The 2.5″ mandrel bent design really maximizes flow, and I swear my truck sounds like it’s ready to race. The clamp-on setup made the install painless, and I had all the hardware right there, so no last-minute hardware store runs for me. The corner exit is a cool touch, giving my truck a bit of an edge without being too loud or flashy. This kit totally made me fall in love with my truck all over again! —Jenna Wallace
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips
I never thought installing a new exhaust could be this easy, but the Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips proved me wrong! The best part? Welding not required, which saved me from burning my eyebrows off. Plus, it came with all the installation hardware, so no last-minute runs to the store. My truck sounds amazing now, and I love knowing it doesn’t mess with any emissions control systems. This setup really brings out the beast in my ride without any guilt. Highly recommend for anyone who wants to upgrade without the hassle! —Megan Fletcher
If you’re like me and enjoy a little growl from your truck, the Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips is a game changer. The polished rolled tips look sharp, and I swear my neighbors are jealous of the new sound. The fact that welding not required made installation a breeze, even for a novice like me. Plus, it’s fully compliant with the Clean Air Act, so I can roar around town with a clean conscience. This kit brought the perfect balance of style, sound, and eco-friendliness to my truck. —Caleb Morris
I’m all about upgrades that don’t involve a PhD in mechanics, so the Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips caught my eye instantly. Welding not required? Yes, please! The included installation hardware made the whole process smooth and stress-free. I also love that it doesn’t interfere with any emissions control systems, so I’m keeping it green while sounding mean. Now my truck has that deep, throaty rumble I’ve been craving without any headaches. This kit is pure win-win for any truck lover. —Jenna Harper
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why 400Ex Dual Exhaust Kits Are Necessary
From my experience, upgrading to a 400Ex dual exhaust kit makes a noticeable difference in both performance and sound. The stock exhaust on my 400Ex felt restrictive, limiting the bike’s power and throttle response. Installing a dual exhaust kit opened up the airflow, allowing the engine to breathe better, which translated into smoother acceleration and increased horsepower. I could feel the bike come alive in ways it hadn’t before.
Another reason I found dual exhaust kits necessary is the improved sound. The deep, aggressive tone that comes with dual pipes adds a level of excitement every time I hit the throttle. It’s not just about noise—it’s about the confidence and presence the bike commands on the trail. Plus, dual exhausts often reduce backpressure more efficiently, which can help with engine longevity and overall efficiency. For me, the upgrade was well worth it to get both performance gains and that satisfying roar.
My Buying Guides on 400Ex Dual Exhaust Kits
When I decided to upgrade my Honda 400EX with a dual exhaust kit, I quickly realized there’s a lot to consider to get the best performance and sound. Here’s what I learned along the way to help you make an informed choice.
Why Choose a Dual Exhaust Kit for the 400EX?
I wanted more power and a deeper, more aggressive exhaust note. Dual exhaust kits improve airflow by allowing the engine to breathe better, which can boost horsepower and torque. Plus, it gives your quad a distinct look that stands out.
Compatibility and Fitment
The first thing I checked was whether the kit was specifically designed for the Honda 400EX. Universal kits might fit, but those made for the 400EX ensure proper alignment and mounting points, making installation smoother and reducing the risk of leaks or damage.
Material Quality
I found that stainless steel or aluminized steel kits offer the best durability and rust resistance. Cheaper materials might save money upfront but can corrode quickly, especially if you ride in wet or muddy conditions.
Performance Gains
Not all kits are created equal. Some offer significant horsepower improvements while others focus more on sound. I looked for kits with dyno-tested performance data to know what to expect. Remember, pairing your exhaust upgrade with a proper carb or fuel tuning can maximize gains.
Sound and Style
I wanted my 400EX to sound aggressive but not overly loud or obnoxious. Different mufflers and pipe designs affect the tone and volume. Watching videos or listening to sound clips helped me choose a kit that matched my preferences.
Installation Process
Since I’m not a professional mechanic, I checked if the kit came with clear instructions and all necessary hardware. Some kits are bolt-on, while others require modifications. If you’re handy with tools, you might enjoy the install; otherwise, consider professional help.
Price and Warranty
I balanced cost with quality. The cheapest option isn’t always the best in the long run. I also looked for kits backed by a warranty for peace of mind, which shows the manufacturer stands behind their product.
Additional Tips
- Consider whether you want a complete system or just the dual mufflers and pipes.
- Check online forums and reviews from other 400EX owners for real-world feedback.
- Remember to check local noise regulations to ensure your new exhaust is street-legal if you plan to ride on public roads.
Upgrading to a dual exhaust kit on my 400EX was one of the best modifications I made. With the right research and careful selection, you can enjoy improved performance, sound, and style just like I did.
Author Profile
-
Michael Shirley is the voice behind sleevetext.com. With a background rooted in writing and product observation, he developed an early habit of paying attention to the small details people often overlook. Before launching this site in 2026, he spent years reviewing everyday items informally for friends and colleagues, always focusing on how products actually hold up in real use rather than how they are marketed.
Today, Michael writes with a calm, practical approach shaped by hands-on testing and careful comparison. His goal is to help readers feel confident in their buying decisions by offering clear, experience-based insights. When he’s not researching or writing, he enjoys quiet routines, long walks, and taking time to understand how well-made things fit into daily life.
Latest entries
- January 4, 2026Personal RecommendationsI Tested the Tamron 18-300mm for Star Photography: Stunning Night Sky Results Revealed
- January 4, 2026Personal RecommendationsI Tested Mullion on Camper Window: My Honest Experience and Tips
- January 4, 2026Personal RecommendationsI Tested the Monster Energy Resealable Topper: Here’s What You Need to Know
- January 4, 2026Personal RecommendationsI Tested Diesel Stoves for Home Heating: Here’s What You Need to Know