Choosing an Arrow exhaust for your motorbike means deciding on three things: the line (i.e., the silencer model), the material, and most importantly, whether you need a road-legal or a racing track product. Arrow is an Italian company specializing in exhausts for motorcycles and and scooters, with lines such as Thunder, X-Kone, Pro-Race, Pista, and Urban, available in aluminum, titanium, stainless steel, and with carbon end caps. In this guide, we explain the differences between silencer, collector, and complete kit, what changes between road-legal and racing, and how to choose the right product. You can find Arrow exhausts in the Arrow catalog on Moon Bike.
Silencer, Collector, or Complete Kit: The Differences
Before choosing the line, it's worth understanding which parts make up an Arrow exhaust, because you can replace just one or the entire system.
- Silencer (or muffler) — this is the final, visible part that gives the bike its sound and look. It's the most requested replacement part because it can be mounted on the original or Arrow collector.
- Collector — the pipe that connects the engine to the silencer. Arrow offers it in a homologated catalytic version (keeps the bike compliant) or racing version (for the track, often without a catalytic converter).
- Link pipe — the intermediate pipe that connects the original collector and the Arrow silencer.
- Complete kit (full system) — collector plus silencer together, the solution that provides maximum performance and weight reduction.
Arrow also produces accessories such as DB-killers (removable mechanical silencers), repacking kits to regenerate the silencer, carbon protections, and replacement catalytic converters.
Arrow Silencer Lines
The main Arrow silencer lines are distinguished by shape, material, and intended use.
Thunder
The Thunder is the most common line, with a classic-sporty cut. It's available in aluminum, in the aluminum Dark version (black), and with a carbon end cap (indicated as "Carby"). It's the typical choice for road bikes and small-to-medium displacement motorcycles, often in the road-legal version.
X-Kone
The X-Kone has a more modern and edgy design, made of Nichrom and in the Nichrom Dark variant. It's designed for those looking for an aggressive and contemporary look.
Pro-Race
The Pro-Race is the most sport-oriented line, in Nichrom and Nichrom Dark, with a racing aesthetic and welded link pipe on several models.
Pista
The Pista is the premium line in titanium, the lightest and highest-performing: in complete kits for bikes like the Aprilia RS 457, it's also offered in a road-legal version.
Urban
The Urban is the line dedicated to scooters, designed for maxi-scooters and sports scooters, available in aluminum and Dark finishes.
Road-Legal or Racing: The Most Important Difference
This is the most important distinction and one where you can't improvise. Arrow exhausts are divided into two main families:
- Homologated (Road-Legal) — they carry European homologation marks (Euro4, Euro5) and are legal for road use. They retain the catalytic converter and comply with noise and emission limits. These are what you need if you use your motorcycle daily.
- Racing — these are designed exclusively for track use or competition: lighter and higher-performing, but not homologated for road circulation.
In Italy, fitting a non-homologated exhaust on the road can result in penalties and issues during vehicle inspections. If you have doubts about which version is right for you, it's always best to ask before purchasing.
Arrow Materials
| Material | Characteristics | Typical on |
|---|---|---|
| Aluminum | Lightweight, good value for money, also in Dark finish | Thunder, Urban lines |
| Titanium | Lightest and most precious, maximum performance | Pista line |
| Stainless Steel | Robust and resistant, used for collectors and link pipes | Collectors, complete kits |
| Nichrom | Alloy with a dark and modern aesthetic | X-Kone, Pro-Race lines |
| Carbon (end cap) | "Carby" end cap that lightens and customizes the silencer | Thunder Carby versions |
Which Arrow Exhaust to Choose
If you use your motorcycle on the road every day
Always choose a homologated (road-legal) silencer or kit. The Thunder aluminum line is the most balanced for road bikes and small-to-medium displacement motorcycles. Verify that the code indicates homologation and that it is specific to your model and year.
If you have a scooter
The Urban line is dedicated to scooters: it gives a sportier tone to the scooter while remaining, in the homologated versions, compliant for circulation.
If you are looking for performance and lightness
The Pista titanium line is the top of the range. If you want the maximum for the track, consider racing collectors and kits, remembering that they are not suitable for road use.
If you just want to change the look and sound
The X-Kone and Pro-Race lines in Nichrom Dark offer a bold and modern aesthetic. Again, always check for the homologated version if the bike is used on the road.
Frequently Asked Questions
Are Arrow exhausts road-legal?
It depends on the product: Arrow produces both homologated (Euro4/Euro5) silencers and kits, legal for road use, and racing versions intended only for the track. It is always indicated on the product and in the description whether it is homologated. If you use your motorcycle on the road, choose a homologated product specific to your model.
What's the difference between an Arrow silencer and a complete kit?
The silencer (or muffler) is only the final part of the exhaust and mounts on the existing collector; the complete kit (full system) includes both the collector and the silencer. The complete kit offers maximum performance and weight reduction, but at a higher cost.
What is an Arrow DB-killer?
The DB-killer is a removable mechanical silencer that reduces exhaust noise. Arrow offers it in different diameters (45 and 50 mm). It should be noted that removing it can make the exhaust non-compliant with road noise limits.
Can I install an Arrow exhaust myself?
Many silencers are designed for mounting on the original collector, but for complete kits and catalytic collectors, it is advisable to contact a workshop, also for the correct management of any control units or sensors. If you have doubts about installation, please contact us.
How do I know if an Arrow exhaust is compatible with my motorcycle?
Each Arrow product is specific to model and year (e.g., Aprilia RS4 125, Aprilia RX/SX 125, Aprilia RS 457, Honda CB 125R). Tell us the make, model, and year of your motorcycle, and we'll tell you the correct silencer or kit.
Where can I buy an Arrow exhaust?
Arrow exhausts are available in the Arrow catalog at Moon Bike. Among the available products are silencers and kits for popular motorcycles, such as the Thunder aluminum silencer for Aprilia RS4 125 or the homologated Pista titanium complete kit for Aprilia RS 457. As an official Piaggio Group dealer based in Naples, Moon Bike helps you choose the right and compliant exhaust for your motorcycle. For official details on the range, you can also consult the manufacturer's website arrow.it.
Don't know which Arrow exhaust is compatible and homologated for your motorcycle? Write to us on WhatsApp at +39 392 456 1248 or call us at 081 341 6300 with your motorcycle's make, model, and year — the Moon Bike team will indicate the right product for you. You can also email us at info@moonbikesrl.it.