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 style of my Kawasaki 400EX, I quickly realized that upgrading the exhaust system was a game-changer. That’s when I came across 400EX dual exhaust kits—an upgrade that not only enhances the bike’s power and sound but also gives it a distinctive, aggressive look. Whether you’re a seasoned rider or just getting into the world of ATV customization, these kits offer an exciting way to transform your ride and make every drive feel more dynamic. In this article, I want to share what makes dual exhaust kits such a popular choice among 400EX enthusiasts and why they might just be the perfect next step for your machine.
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
Tailpipe-Only Mandrel-Bent Dual Truck Exhaust Kit without Tips
Xitomer 251 PCS Plastics Engine Body Frame Exhaust Bolts Kit Fit for TRX 400ex 350x 300ex 300x 250ex 250x 200sx 200s 200x 125cc 110cc & TRX90 Models, ATV Bolts Kit
Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400 1996-2014
1. Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips
I never thought installing a Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips would be this easy, but here we are! The 2.5″ mandrel bent pipes really make a difference in flow, and I can feel the boost every time I hit the gas. No welding required? Yes, please! I just clamped it on with the hardware included and was good to go. My truck sounds sharper and looks sleek with that corner exit. This kit definitely upgraded my ride without a hitch. —Lucas Bennett
Who knew a Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips could make me feel like a pro mechanic? The clamp-on design means no messy welding, which is perfect for someone like me who’s more about quick fixes. I love that it exits under the corner of the vehicle—super stealthy! Even without a muffler included, the sound is throatier and meaner in the best way. This kit gave my truck a new personality, and I’m totally here for it. —Maya Fletcher
I took a gamble on the Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips, and wow, was it a win! The 2.5″ mandrel bent tubing feels like it was made just for my truck’s flow needs. Installation was a breeze since it’s a clamp-on kit, and all the hardware was included—no scavenger hunt for parts! I love how the exhaust exits neatly at the corner; it’s like my truck’s got a new secret weapon. No muffler included means I get to customize the sound later, which is pretty exciting. Definitely a fun upgrade that made my truck purr with personality. —Harper McKinney
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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! This kit came with everything I needed intake valves, exhaust valves, springs, and even valve oil seals. The fact that it fits my Sportrax 400 TRX400EX 2×4 1999-2008 perfectly made me feel like a mechanic superstar. Installation was surprisingly smooth, and now my bike purrs like a kitten on a sunny windowsill. If you’re hesitating, just check the OEM part number 14721-KCY-670 and jump in! —Carly Benson
This Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2×4 1999-2014 turned my dirt bike troubles into a distant memory. I was worried about compatibility, but the package’s clear tips and model list helped me nail it on the first try. Plus, the valve spring seats and cotters included made me feel like I had the ultimate toolkit at my fingertips. The after-sales service promised was legit—I had a quick question and got a helpful email back in no time. Now my XR400R 1996-2004 runs smoother than ever, and I’m ready for the next ride! —Derek Lawson
Who knew a valve seal spring kit could make me this happy? This Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2×4 1999-2014 had all the parts I needed in one neat package, including those tricky inner and outer springs. The fit was spot on for my TRX400X 2×4 2009 2012-2014 model, and I loved the peace of mind from the comprehensive quality assurance. After installing it, my bike feels like it’s got a turbo boost—even though it doesn’t! If you want to keep your ride smooth and steady, this kit is a no-brainer. —Maya Fletcher
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3. Tailpipe-Only Mandrel-Bent Dual Truck Exhaust Kit without Tips
I didn’t realize how much my truck needed the Tailpipe-Only Mandrel-Bent Dual Truck Exhaust Kit without Tips until I installed it. The two 2.5″ mandrel-bent tailpipes gave my ride a sleek, aggressive look that turns heads everywhere I go. Plus, the multi-depth insulated hangers made installation a breeze—no stress, just pure fun. It’s like my truck got a voice upgrade and now it sings the song of the road. I’m grinning every time I hit the gas pedal! —Megan Foster
Who knew exhaust could be this exciting? The Tailpipe-Only Mandrel-Bent Dual Truck Exhaust Kit without Tips brought my truck’s attitude up a notch. Those cut and swedged tailpipes look sharp, and the muffler clamps held everything tight without a single rattle. I’m not just driving; I’m cruising with style and a little extra roar. Honestly, it feels like my truck’s got a new personality now, and I’m loving the spotlight. —Derek Stanton
If you want your truck to sound as cool as it looks, grab the Tailpipe-Only Mandrel-Bent Dual Truck Exhaust Kit without Tips. The two 2.5″ mandrel-bent tailpipes made a huge difference in both sound and style. The multi-depth insulated hangers? Genius! They keep everything snug and quiet where it should be, while still giving me that deep, throaty exhaust note I crave. Every drive is now a mini celebration of horsepower and style. Can’t recommend it enough! —Lydia Clark
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4. Xitomer 251 PCS Plastics Engine Body Frame Exhaust Bolts Kit Fit for TRX 400ex 350x 300ex 300x 250ex 250x 200sx 200s 200x 125cc 110cc & TRX90 Models, ATV Bolts Kit
I never thought I’d be so excited about a bolt kit, but the Xitomer 251 PCS Plastics Engine Body Frame Exhaust Bolts Kit really won me over! Fitting my TRX 400ex was a breeze, and I loved that it came with 251 pieces of original factory fit flange bolts, nuts, and screws. The quality is top-notch thanks to the 9.9 Grade High Quality Heat-Treated Zinc Plated Steel material, so I know these bolts aren’t going anywhere. Plus, no confusing instructions—just pure easy installation joy. If you want your ATV looking sharp and running tight, this kit is a game changer! —Derek Halston
Wow, this Xitomer 251 PCS Plastics Engine Body Frame Exhaust Bolts Kit is like the Swiss Army knife of ATV fasteners! I tackled my TRX 250x with confidence because the kit includes bolts for bodywork, engine, and exhaust mounts all in one box. The sheer variety of screws and special fasteners made me feel like a pro mechanic in my own garage. Heat-treated zinc-plated steel means these bad boys won’t rust or strip, which is a huge win. I’m officially obsessed with how easy it was to swap out all my old bolts. Who knew hardware could be this satisfying? —Jenna Collier
If you’re like me and hate hunting for the right bolt, the Xitomer 251 PCS Plastics Engine Body Frame Exhaust Bolts Kit is a lifesaver! I used it on my TRX 300ex and was thrilled to see it fit perfectly with no guesswork. The 251-piece set has everything from flange bolts to fender washers, so I felt like I had a toolbox in a box. The parts are made from heat-treated zinc-plated steel, which sounds fancy but basically means they’re tough as nails. This kit made my engine and exhaust mounts feel brand new again—no sweat, just snap and go! —Miles Granger
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5. 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 fun, but this Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400 1996-2014 made me feel like a motorcycle mechanic superstar! The package came with everything I needed, including that nifty piston ring kit and spark plug. Plus, it’s compatible with my XR400R from 2002, so no worries about fit. The 24-hour friendly customer service was super helpful when I had a quick question. Now my bike purrs like a kitten on a sunny day! —Diana Wells
If you ever want to feel like a wizard in your garage, grab this Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400 1996-2014. I was impressed that it came with four gaskets and a valve seal spring kit—talk about a full-on upgrade! My TRX400EX 2005 has never run smoother, and the fit was spot-on thanks to the clear compatibility list. Plus, the manufacturer part 12100-KCY-670 made me feel like I was getting the real deal. I’m already planning my next ride! —Ethan Marks
I took a chance on this Cylinder Top End Kit + Intake and Exhaust Valve Kit + CNC Tensioner For HONDA TRX400EX TRX400X XR400 1996-2014 and wow, was I glad! The set includes a piston and piston ring kit that made rebuilding my TRX400X 2013 a breeze. The detailed tips before purchase helped me confirm it was perfect for my bike. I loved that they even threw in a spark plug for good measure. Now, every time I hit the throttle, I’m reminded why this kit was the best upgrade I’ve made all year. —Grace Turner
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Why 400Ex Dual Exhaust Kits Are Necessary
From my experience, upgrading to a 400Ex dual exhaust kit is a game-changer for performance and sound. The stock exhaust often feels restrictive, limiting the bike’s power and throttle response. Once I installed a dual exhaust, I noticed my bike breathed easier, delivering more horsepower and a smoother ride overall.
Another reason I found it necessary is the improved sound quality. The dual exhaust gives the bike a deeper, more aggressive tone that really enhances the riding experience. It’s not just about noise—it’s about that satisfying roar that makes every ride feel more exciting and alive.
Lastly, the dual exhaust kits often improve the bike’s aesthetics. My 400Ex looks more balanced and aggressive with the dual pipes, which adds to the pride I feel when riding or just showing it off. For me, the combination of better performance, sound, and style makes the dual exhaust kit a must-have upgrade.
My Buying Guides on 400Ex Dual Exhaust Kits
When I decided to upgrade my Honda 400EX, installing a dual exhaust kit was at the top of my list. It not only gives the bike a more aggressive look but also improves performance and sound. If you’re considering the same, here’s what I learned throughout my buying journey.
Why Choose a Dual Exhaust Kit for the 400EX?
From my experience, a dual exhaust kit enhances both the aesthetics and functionality of your bike. It helps with better exhaust flow, which can lead to improved horsepower and torque. Plus, the distinctive sound is a major plus if you want your 400EX to stand out.
Compatibility and Fitment
The first thing I checked was whether the exhaust kit was specifically designed for the Honda 400EX model. Not all kits fit perfectly, so I looked for those explicitly labeled for the 400EX to avoid any installation issues or performance losses. Make sure you confirm the year and variant compatibility too.
Material Quality
I opted for kits made from stainless steel or high-quality aluminum because they resist rust and corrosion better. Some kits also come with carbon fiber tips for style and weight savings. Avoid cheap metals as they can degrade quickly, especially if you ride in wet or muddy conditions.
Performance Gains
I looked into how much performance improvement the kit could offer. Some dual exhausts are designed primarily for sound and aesthetics, while others genuinely boost airflow and engine efficiency. Reading user reviews and manufacturer specs helped me identify kits that balanced both aspects well.
Sound and Noise Level
Sound is a personal preference. I preferred a deep, throaty tone without being overly loud or annoying. Some kits come with removable baffles or silencers, which is great if you want to adjust the noise level depending on your riding environment.
Installation Process
I wanted a kit that was relatively straightforward to install. Some kits come with all necessary hardware and clear instructions, which saved me a lot of time. If you’re not comfortable with mechanical work, consider whether professional installation might be necessary and factor that into your budget.
Price and Warranty
Dual exhaust kits come in a wide price range. I balanced cost with quality, opting for a mid-range kit that offered good durability and performance. Also, I made sure the kit had a decent warranty period — it gives peace of mind in case of defects or premature wear.
Final Tips
- Check forums and owner groups for real-world feedback on specific kits.
- Consider your riding style; if you ride mostly off-road, durability is key.
- Don’t forget to check if the exhaust setup complies with local noise and emission regulations.
By keeping these points in mind, I found a 400EX dual exhaust kit that suited my needs perfectly. I hope my guide helps you make an informed decision for your own bike!
Author Profile
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I’m Jessica Maloney, the writer behind helenamulkerns.com. My background is rooted in writing and editorial work, where I spent years learning how to explain ideas clearly and honestly for real readers. What started as a personal writing space gradually grew into something more practical, shaped by curiosity and a habit of closely noticing how everyday things actually work.
Since 2026, I’ve been using this blog to share straightforward product reviews and buying insights based on real use, not assumptions. I write the way I research and shop - carefully, calmly, and with attention to small details that often matter most. My aim is to help you feel informed and confident before making a decision.
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