Arrow Thunder Aluminum Exhaust Silencer - Aprilia RX/SX 125 (2018-2020)
$373.00
$440.00
-15%
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Arrow Thunder Aluminum Exhaust Silencer - Aprilia RX/SX 125 (2018-2020)
$373.00
$440.00
-15%
Taxes included.
Shipping calculated at checkout.
Codice: 52509AO
Pickup available at Moon Bike S.r.l.
Usually ready in 1 hour
The Arrow Thunder aluminum silencer (code 52509AO) is an ECE-approved slip-on exhaust designed for Aprilia RX 125, Aprilia SX 125 (2018-2020), UM DSR EX 125 (2018-2020), and Malaguti XTM/XSM 125 4T (2019-2020). With its distinctive diamond shape, the Thunder Off-Road combines lightness, performance, and aggressive styling. Entirely manufactured in Italy by Arrow Special Parts S.p.A., an official technical partner of Aprilia.
✓ Strengths
- Aluminum body – lightweight and corrosion-resistant, with Arrow's typical diamond-shaped cross-section
- ECE R92.01 approved – Euro4/Euro5/Euro5+ compliant, allowing free circulation on public roads
- dB-Killer included – removable for track use (not approved without dB-Killer)
- Weight of only 2.43-2.47 kg – significant weight reduction compared to the original exhaust
- Slip-on mounting – installs on the original manifold without engine modifications
- Supplied complete with link pipe, bolts, and all necessary mounting hardware
- Made in Italy – produced in Arrow's factories in San Giustino (PG), Umbria
Technical specifications
| Brand | Arrow Special Parts |
| Product code | 52509AO |
| Line | Thunder Off-Road |
| Type | Slip-on silencer (single) |
| Body material | Aluminum |
| End cap material | Stainless steel |
| Internal material | Stainless steel |
| Link pipe material | Stainless steel |
| Silencer section | Rhombus (diamond shape) |
| Body length | 350 mm |
| Inlet diameter | 36 mm |
| Outlet diameter | 40 mm |
| Weight | 2.43 – 2.47 kg |
| dB-Killer | Yes, included and removable |
| Lambda sensor | No |
| CO sensor | No |
| Mounting | Welded bracket |
| Homologation | ECE R92.01 – Euro4/Euro5/Euro5+ |
| Production | Made in Italy – San Giustino (PG) |
⚠️ Important notes:
• The 52509AO silencer mounts as a slip-on to the original manifold; it comes complete with the link pipe and mounting hardware.
• Homologation is valid exclusively with the dB-Killer inserted. Removing the dB-Killer voids its homologation and is only permitted on closed tracks.
• For a potential racing configuration with a dedicated Arrow manifold, optional codes 52001PD (racing manifold) and 52001PZ (approved catalytic manifold) are available.
• Homologation is valid for vehicle types: KX / KX1 (Aprilia RX/SX 125), UM125-DSM (UM DSR EX 125), and ET1 (Malaguti XTM/XSM 125 4T).
• The 52509AO silencer mounts as a slip-on to the original manifold; it comes complete with the link pipe and mounting hardware.
• Homologation is valid exclusively with the dB-Killer inserted. Removing the dB-Killer voids its homologation and is only permitted on closed tracks.
• For a potential racing configuration with a dedicated Arrow manifold, optional codes 52001PD (racing manifold) and 52001PZ (approved catalytic manifold) are available.
• Homologation is valid for vehicle types: KX / KX1 (Aprilia RX/SX 125), UM125-DSM (UM DSR EX 125), and ET1 (Malaguti XTM/XSM 125 4T).
Vehicle compatibility
| Brand | Model | Years | Vehicle Type |
|---|---|---|---|
| Aprilia | RX 125 4T | 2018 – 2020 | KX / KX1 |
| Aprilia | SX 125 4T | 2018 – 2020 | KX / KX1 |
| UM Moto | DSR EX 125 | 2018 – 2020 | UM125-DSM |
| Malaguti | XTM 125 4T | 2019 – 2020 | ET1 |
| Malaguti | XSM 125 4T | 2019 – 2020 | ET1 |
Optional / Recommended products
| 52001PD | Arrow Racing Manifold – for full racing system configuration (not approved) |
| 52001PZ | Arrow Approved Catalytic Manifold – for approved complete kit with catalytic converter |
Who it's perfect for
The Arrow Thunder 52509AO is ideal for owners of Aprilia RX/SX 125 who are looking for a lightweight, approved silencer with a strong sound for both road and off-road use. Perfect for those who want to enhance their motorcycle's aesthetics with a racing design while maintaining full legality on the road thanks to ECE approval. Also suitable for owners of a UM DSR EX 125 or a Malaguti XTM/XSM 125 4T from the same period.
🛡️ Warranty and quality
Original Arrow Special Parts product, Made in Italy. Supplied with ECE approval certificate and mounting instructions. Moon Bike S.r.l. is an authorized Arrow dealer based in Cercola (NA).
Original Arrow Special Parts product, Made in Italy. Supplied with ECE approval certificate and mounting instructions. Moon Bike S.r.l. is an authorized Arrow dealer based in Cercola (NA).
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Tutti i prodotti hanno garanzia legale di 24 mesi. Siamo Rivenditore Ufficiale Piaggio Group: i ricambi originali sono certificati con codice OEM verificabile.
Assistenza tecnica +
Il nostro team tecnico è disponibile via WhatsApp +39 392 456 1248 Lun-Ven 9:00–13:30 / 14:30–18:00, oppure via email.