Upgrading the exhaust on a Honda Grom is one of the most effective ways to shed weight and gain a few precious horsepower. If you are looking for the best exhaust for honda grom, you have come to the right place. This guide will walk you through the top options, what to look for, and how to choose the perfect pipe for your mini-moto.
The Honda Grom is a blast to ride, but its stock exhaust is heavy and restrictive. Swapping it out not only improves performance but also gives your bike a much better sound. Let’s dive into the details so you can make an informed decision.
Best Exhaust For Honda Grom
When we talk about the best exhaust for honda grom, we are looking at a few key factors: weight savings, power gains, sound quality, and build durability. The market is full of options, but not all are created equal. Below, we break down the top contenders that consistently deliver results.
Yoshimura RS-9 Carbon Fiber Exhaust
The Yoshimura RS-9 is a fan favorite for a reason. It offers a significant weight reduction of about 4 pounds compared to the stock system. The carbon fiber canister looks premium and helps with heat management.
- Weight savings: Around 4 lbs
- Sound: Deep and throaty, not too loud
- Power gain: 2-3 hp with proper tuning
- Build quality: Excellent, with a lifetime warranty on the canister
This exhaust is a bolt-on affair, meaning you can install it at home with basic tools. The sound is aggressive but not obnoxious, making it great for daily riding. If you want a proven performer, this is a solid choice.
Two Brothers Racing M-2 VALE Exhaust
Another top contender is the Two Brothers Racing M-2 VALE. This system is known for its unique oval shape and deep tone. It shaves off about 3.5 pounds from the stock setup.
- Weight savings: Around 3.5 lbs
- Sound: Low and rumbling, with a nice bark on throttle
- Power gain: 1.5-2.5 hp
- Build quality: Durable stainless steel with carbon fiber end cap
The M-2 VALE comes with a removable baffle, so you can adjust the sound level. Installation is straightforward, and it fits perfectly on all Grom models. It is a bit more affordable than the Yoshimura, making it a great value pick.
Akrapovic Slip-On Exhaust
Akrapovic is a premium brand known for high-end exhausts. Their slip-on for the Grom is no exception. It is made from titanium and carbon fiber, offering a weight reduction of about 3.8 pounds.
- Weight savings: Around 3.8 lbs
- Sound: Smooth and refined, with a sporty note
- Power gain: 1.5-2 hp
- Build quality: Top-tier, with a beautiful finish
This exhaust is pricier than most, but you get what you pay for. The build quality is exceptional, and the sound is perfect for those who want a subtle upgrade. It is also very light, which helps with handling.
Zoom Loop Exhaust
If you want something unique and lightweight, the Zoom Loop exhaust is worth considering. It is a full system that replaces the entire header and muffler. The design is minimalist and saves about 5 pounds.
- Weight savings: Around 5 lbs
- Sound: Loud and aggressive, with a distinct tone
- Power gain: 2-3 hp
- Build quality: Good, but may require some tuning
The Zoom Loop is not for everyone due to its loudness. However, if you prioritize weight savings and performance, it is a strong option. Just be aware that you might need a fuel controller to get the most out of it.
M4 GP Style Exhaust
The M4 GP Style exhaust is a popular choice for those who want a race-inspired look. It is a full system that drops about 4.5 pounds. The sound is raw and aggressive, similar to what you would hear on a track.
- Weight savings: Around 4.5 lbs
- Sound: Very loud, with a sharp crackle
- Power gain: 2-3 hp
- Build quality: Sturdy, with a brushed aluminum finish
This exhaust is best for riders who want maximum performance and don’t mind the noise. It is also relatively affordable compared to other full systems. Just make sure to check local noise regulations before installing.
How To Choose The Right Exhaust
Choosing the best exhaust for honda grom depends on your priorities. Here is a step-by-step guide to help you decide.
Step 1: Determine Your Budget
Exhaust prices range from $200 to over $600. Slip-ons are cheaper, while full systems cost more. Set a budget before you start shopping.
Step 2: Consider Sound Preference
Do you want a deep rumble or a loud scream? Listen to sound clips online to get an idea. Some exhausts come with baffles to adjust volume.
Step 3: Evaluate Weight Savings
The stock exhaust weighs about 8-9 pounds. A good aftermarket system can cut that in half. Lighter weight improves acceleration and handling.
Step 4: Check Power Gains
Most exhausts add 1-3 horsepower. For maximum gains, consider a full system with a fuel controller. This combo can unlock the Grom’s true potential.
Step 5: Look At Build Quality
Stainless steel and titanium are durable. Carbon fiber looks great but can crack if dropped. Check for warranties and customer reviews.
Installation Tips
Installing a new exhaust is a rewarding DIY project. Here is a simple guide to get it done.
Tools You Will Need
- Socket wrench set
- Allen keys
- Penetrating oil (for stubborn bolts)
- Torque wrench (optional)
Step-By-Step Installation
- Let the bike cool down completely.
- Remove the stock exhaust by unbolting the header and muffler.
- Apply penetrating oil to rusty bolts if needed.
- Install the new exhaust, starting with the header.
- Tighten all bolts to spec, but don’t overtighten.
- Start the bike and check for leaks.
Most slip-ons take about 30 minutes to install. Full systems may take an hour or two. Always follow the manufacturer’s instructions.
Performance Gains And Tuning
After installing a new exhaust, you might notice a difference in power. However, to get the best results, tuning is often required.
Why Tuning Matters
The stock ECU is tuned for the restrictive stock exhaust. A freer-flowing system changes air-fuel ratios. Without tuning, you might lose power or run too lean.
Fuel Controller Options
- Power Commander V
- Dynojet PCV
- ECU flash from specialists
A fuel controller lets you adjust fuel maps for optimal performance. Some exhausts come with pre-loaded maps. This is especially important for full systems.
Dyno Testing
If you want precise tuning, consider a dyno session. It costs around $300-500 but ensures maximum power and safety. Many riders see 3-4 hp gains with a full system and tune.
Sound Comparison
Sound is a personal preference. Here is a quick breakdown of what to expect from each exhaust.
| Exhaust | Sound Level | Tone |
|---|---|---|
| Yoshimura RS-9 | Moderate | Deep, throaty |
| Two Brothers M-2 | Moderate to loud | Rumbling |
| Akrapovic | Moderate | Smooth, refined |
| Zoom Loop | Very loud | Aggressive |
| M4 GP | Very loud | Raw, race-like |
Remember that loud exhausts can attract attention from law enforcement. Check your local noise laws before making a choice.
Maintenance And Care
To keep your exhaust looking and performing great, follow these tips.
- Clean it regularly with mild soap and water.
- Avoid harsh chemicals that can damage the finish.
- Check bolts periodically for tightness.
- Inspect for cracks or rust, especially on stainless steel.
- Use a heat wrap if you ride in wet conditions.
Carbon fiber requires extra care. Use a dedicated cleaner to avoid scratches. With proper maintenance, your exhaust will last for years.
Frequently Asked Questions
What Is The Best Exhaust For Honda Grom For Beginners?
The Yoshimura RS-9 is a great choice for beginners. It is easy to install, sounds good, and offers solid performance gains without being too loud.
Do I Need To Tune My Grom After Installing An Exhaust?
It depends on the exhaust. Slip-ons often don’t require tuning, but full systems usually do. A fuel controller or ECU flash is recommended for best results.
How Much Weight Can I Save With A New Exhaust?
Most aftermarket exhausts save 3-5 pounds compared to the stock system. The Zoom Loop offers the most weight savings at around 5 pounds.
Will A New Exhaust Void My Warranty?
It might, depending on the dealer. Some exhausts are considered bolt-on modifications and are fine. Check with your dealer before installing.
Can I Install The Exhaust Myself?
Yes, most exhausts are designed for DIY installation. Basic mechanical skills and tools are all you need. Follow the included instructions carefully.
Final Thoughts
Finding the best exhaust for honda grom comes down to your personal needs. Whether you prioritize weight savings, sound, or power, there is an option for you. The Yoshimura RS-9 is a reliable all-rounder, while the Zoom Loop offers maximum weight reduction. Take your time, read reviews, and listen to sound clips before buying. Once you install your new exhaust, you will wonder why you didn’t do it sooner. The Grom becomes more fun, lighter, and sounds incredible. Happy riding, and enjoy the upgrade!