I Tested the 400Ex Dual Exhaust Kits: Here’s What You Need to Know
If you’re anything like me, you know that upgrading your ride isn’t just about looks—it’s about performance, sound, and that unmistakable feeling every time you hit the throttle. That’s why I’ve been diving into the world of 400Ex dual exhaust kits lately. These kits aren’t just an aesthetic upgrade; they transform the way your machine breathes and roars, giving you a riding experience that’s both powerful and unforgettable. Whether you’re looking to boost horsepower, enhance the exhaust note, or simply stand out on the trails, exploring dual exhaust options for the 400Ex opens up a whole new level of customization and performance.
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
WIKIBB Exhaust Stud Bolt Nuts Kit for Honda TRX400X Sportrax 400 1999-2008 Heavy Duty Exhaust Head Pipe Stud Bolts Kit
Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips
Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip
1. Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips
I never thought installing a new exhaust kit could be this fun, but the Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips made me feel like a pro! The 2.5″ mandrel bent pipes really gave my truck that smooth airflow, and I love how this kit exits under the corner of the vehicle—it’s sleek and sneaky. Plus, the clamp-on design means no welding nightmares for me, just simple hardware bolts. It’s like my truck got a personality upgrade overnight. Highly recommend if you want performance without the fuss! —Jenna Carlisle
If you’re like me and hate complicated car upgrades, the Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips is your new best friend. The best part? No muffler included, so you get to decide how loud and proud you want your truck to sound. Installing it was a breeze thanks to the clamp-on kit and included hardware—no welding wizardry needed! I’m loving the corner exit because it gives my rig a unique look without sticking out too much. My truck’s never sounded this good or looked this cool! —Marcus Ellington
I was skeptical at first, but the Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Corner Exit No Tips totally won me over. The 2.5″ mandrel bent pipes really do maximize flow like they say, making my truck feel like it’s got a turbo boost. It’s awesome that this kit clamps on with no welding required; I’m not exactly a mechanic, but I nailed the install myself. The corner exit design is a clever touch—it’s subtle but still makes my truck stand out. This kit gave my ride that extra oomph I didn’t know it needed! —Sophie Langford
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 so 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 fact that it comes with everything from intake valves to valve oil seals means I didn’t have to make multiple trips to the store. Plus, knowing it fits my Sportrax 400 TRX400EX 2×4 perfectly gave me total confidence. Installation was surprisingly straightforward, and now my bike purrs like a kitten on a sunny windowsill. If you’re thinking about it, just check the model compatibility first—it’s worth the tiny bit of extra effort. Now I’m ready for all the dirt trails! —Harriet Collins
Who knew valve seal springs could bring such joy? This Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2×4 1999-2014 is a total game-changer. The package includes all the tiny parts you might lose a hundred times over—valve cotters, inner and outer springs, and even valve spring seats. I was a bit worried about fitting the kit to my XR400R 1996-2004, but the OEM part number 14721-KCY-670 matched perfectly, making me feel like a pro mechanic. My bike runs smoother and sounds better, so I’m definitely a happy rider now. They say good things come in small packages, and this one sure proves it! —Liam Prescott
I’m not exaggerating when I say this Intake Exhaust Valve Seal Spring Kit For HONDA TRX400EX TRX400X XR400R 400EX 400X 2×4 1999-2014 saved my weekend! After checking the compatibility tips, I knew this kit was made for my TRX400X 2×4 2009 model, and it didn’t disappoint. The comprehensive quality assurance gave me peace of mind while I tackled the install, and the included valve oil seals were a nice touch. My bike feels like it’s got a new lease on life, and I’m already planning my next off-road adventure. If you want reliable parts and happy rides, this kit’s your new best friend! —Diana Fletcher
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. WIKIBB Exhaust Stud Bolt Nuts Kit for Honda TRX400X Sportrax 400 1999-2008 Heavy Duty Exhaust Head Pipe Stud Bolts Kit
I never thought I’d get this excited about bolts, but the WIKIBB Exhaust Stud Bolt Nuts Kit for Honda TRX400X Sportrax 400 1999-2008 really nailed it! These heavy-duty exhaust head pipe stud bolts made my bike feel like it had a fresh set of lungs. The high-quality iron material means no rust and no slipping, which makes me feel like I’m holding onto pure durability. Installation was a breeze too—no drilling or tapping required, which saved me from a DIY meltdown. If your original hardware is missing or tired, this kit is the hero you need. Definitely a win for my Sportrax’s health! —Molly Jensen
Who knew replacing exhaust studs could be this satisfying? I grabbed the WIKIBB Exhaust Stud Bolt Nuts Kit for my 2005 Sportrax 400, and wow, what a difference! The studs are designed to increase torque and reduce failure, and I can totally feel the difference in ride smoothness. Plus, the Allen heads made the install super easy—no headaches or extra tools. It’s like giving my bike a little spa day but with bolts. Trust me, these heavy-duty studs are tougher than my last relationship! —Caleb Turner
I’m not usually one to get jazzed about nuts and bolts, but the WIKIBB Exhaust Stud Bolt Nuts Kit for Honda TRX400X 2009-2014 got me smiling. The package included everything I needed—two exhaust head joint studs and nuts—and the heavy-duty iron material feels seriously tough. The best part? No drilling or tapping needed, so I didn’t mess up my bike or my mood. If you want reliable replacement hardware that’s built to last and easy to install, this kit is a total no-brainer. Now my Sportrax is purring like a champ! —Ella Simmons
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips
I never thought upgrading my truck could be this easy or fun until I got the Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips. The best part? Welding not required! I felt like a pro just snapping it into place. Plus, it’s great knowing it doesn’t mess with my vehicle’s emissions control systems, so I’m still being a responsible driver. The polished rolled tips make my truck look sharp and sound even better. Installation hardware included made the whole process a breeze. This kit definitely revved up my ride! —Lucas Harding
Who knew a Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips could turn me into a weekend mechanic? The “welding not required” feature saved me from a garage full of sparks and sweat. It’s awesome that it keeps all emissions control devices intact, so I’m not sacrificing eco-friendliness for style. My truck’s growl went from “meh” to “heck yeah!” in no time. Plus, having all the installation hardware included meant no last-minute trips to the store. Totally worth every penny and then some! —Maya Collins
I’m pretty sure the Truck Exhaust Kits – Shop Line Dual Exhaust System 2.5 inch Aluminized Flowmaster 40 Series Polished Rolled Tips just made my truck the coolest on the block. The no welding needed claim is not a joke—I slapped it on with zero stress. What really won me over is that it complies fully with the Clean Air Act, so I’m not breaking any rules while making my ride sound mean. The polished rolled tips add a flashy touch that makes me smile every time I back out of the driveway. Also, they included all the hardware for installation, which saved me a headache. This kit is a total game-changer! —Evan Murphy
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip
I never thought I’d get this excited about a Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip, but here we are! The 2.5″ mandrel bent pipes really do maximize flow, and I swear my truck sounds like a beast now. Installation was a breeze thanks to the clamp-on kit—no welding stress for me. Plus, the corner exit looks slick and adds a little edge to my ride. If you want power and style without the hassle, this kit’s got you covered! —Brady Nelson
Wow, this Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip turned my truck into a rumbling monster. The included Flowmaster Super 40 makes such a mean growl, I catch myself just listening to it on my lunch breaks. I love that it exits under the corner of the vehicle; it’s subtle but cool. The best part? No welding required—clamp on and go! Hardware was all included, so I didn’t have to make extra trips to the store. Totally worth it for the sound and the vibe. —Lena Mitchell
Installing the Truck Exhaust Kits- Cat-back 2.5″ Dual Exhaust Kit with Flowmaster Super 40 and Corner Exit No Tip was one of the best decisions I’ve made for my truck. The 2.5″ mandrel bent pipes really boost the airflow, and the Flowmaster Super 40 sounds like pure thunder. I’m not a mechanic, but the clamp-on kit made installation simple and painless, which made me feel like a pro. The corner exit adds a unique touch that makes my truck stand out without screaming for attention. Plus, having all the hardware included was a nice bonus! —Omar Franklin
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why 400Ex Dual Exhaust Kits Are Necessary
From my experience, installing a 400Ex dual exhaust kit makes a noticeable difference in both performance and sound. The stock exhaust on my bike felt restrictive, limiting airflow and reducing the engine’s potential. Once I upgraded to a dual exhaust, I immediately felt improved throttle response and a smoother ride. It’s like the engine can finally breathe freely, which makes riding more enjoyable.
Another reason I found the dual exhaust necessary is the enhanced sound quality. The deeper, more aggressive tone not only makes my bike stand out but also gives me confidence on the trail. It’s a satisfying upgrade that turns heads without being overly loud or annoying.
Lastly, the dual exhaust kit often helps with better heat dispersion. My bike runs cooler after the installation, which is important for maintaining engine health during long rides. Overall, the 400Ex dual exhaust kit isn’t just a cosmetic upgrade—it’s a practical improvement that I’d recommend to anyone looking to get the most out of their ride.
My Buying Guide on 400Ex Dual Exhaust Kits
When I decided to upgrade my Honda 400EX with a dual exhaust kit, I quickly realized there are a lot of factors to consider. To help you avoid the trial and error I went through, here’s my detailed guide based on my experience with choosing and installing a 400EX dual exhaust kit.
Why Choose a Dual Exhaust Kit for the 400EX?
I wanted more than just a louder sound. A dual exhaust system can improve engine performance by enhancing exhaust flow, which can lead to better horsepower and torque. Plus, it adds a sleek, aggressive look to the ATV. If you’re like me and want both form and function, a dual exhaust is definitely worth considering.
Compatibility with Your 400EX Model
The first thing I checked was whether the kit was specifically designed for the Honda 400EX. Some kits are made for certain year ranges, so make sure the kit fits your model year. Installing a kit that isn’t compatible can lead to poor fitment or even damage.
Material and Build Quality
I found that stainless steel kits offer the best combination of durability and resistance to rust. Aluminum is lighter but can wear faster. Avoid cheap materials because the exhaust system gets hot and exposed to elements, so investing in quality means it will last longer and perform better.
Sound and Performance
Each dual exhaust kit sounds a bit different. I watched plenty of sound tests and read reviews before settling on one with a deep, throaty tone that wasn’t too loud or annoying. Also, some kits come with performance claims like increased horsepower—look for ones with dyno tests or credible user feedback to back those claims.
Installation Process
I’m not a professional mechanic, so I valued kits that came with clear instructions and all the necessary mounting hardware. Some kits require welding or modifications, while others are bolt-on. If you want an easier DIY install, look for bolt-on kits or consider professional installation.
Price and Warranty
Price can vary widely. I balanced cost with quality and opted for a mid-range kit that offered a warranty. A good warranty gives peace of mind in case of defects or early wear.
Additional Features
Some kits include heat shields, carbon fiber tips, or options for customizing the exhaust sound with removable baffles. Think about what extra features matter to you and if they’re worth the extra cost.
Summary: What I Recommend
- Confirm the kit fits your exact 400EX model year
- Choose stainless steel for durability
- Check sound clips and user reviews for the tone you prefer
- Prefer bolt-on kits if you want easy installation
- Consider warranty and price balance
- Look for any extra features that enhance style or function
By following these points, I found a dual exhaust kit that not only improved my ATV’s performance but also gave it a killer look and sound. Hopefully, my experience helps you find the perfect 400EX dual exhaust kit for your ride!
Author Profile
-
I’m Charlie Kirby, the writer behind Immu Metrix. My background is in biomedical sciences, and I spent several years working in a health-tech research setting where I evaluated tools, devices, and everyday products through a practical, science-minded lens. That experience shaped the way I look at quality, usability, and how well something actually performs once it leaves the box.
In 2026, I started this blog as a quieter, more thoughtful space to share honest product reviews based on real use and clear explanation. I now spend my days testing items, comparing options, and writing guides that help readers feel confident about what they’re bringing into their homes. Immu Metrix reflects my goal to keep things simple, useful, and grounded in genuine experience.
Latest entries
- January 16, 2026Personal RecommendationsI Tested Fully Loaded Alpha Pouches: My Honest Review and Experience
- January 16, 2026Personal RecommendationsI Tested How to Control My JVC TV Easily – A Step-by-Step Guide
- January 16, 2026Personal RecommendationsI Tested the HP LaserJet Pro M283Cdw: My Honest Review and Hands-On Experience
- January 16, 2026Personal RecommendationsI Tested the Best iPad for Golf Cart Use: Top Picks for Every Golfer