ARROW Thunder street-legal aluminum exhaust for APRILIA RS4 125 11-16

ARROW THUNDER 51509AO aluminum silencer for APRILIA RS4 125 11-16

Increasingly, smaller silencers are being developed and mounted in unusual positions. For this reason, Arrow has developed the Street Thunder exhaust line, combining design and cutting-edge technology. Available in stainless steel or carbon fiber, these silencers feature a diamond shape inspired by the Off-Road program.

To compensate for the smaller volume, Arrow uses high-quality sound-absorbing and heat-insulating materials, extensively tested on the track. The Street Thunder line is available in homologated versions and in materials such as titanium, aluminum, and carbon fiber, offering superior performance and a striking aesthetic.

Technical features

• IMPORTANT: Do I need to buy anything else to mount it on my APRILIA RS4 125 11-16?: OPTIONAL: Aprilia RS4 125 2011-2016: This 51509AO exhaust can be used with this link pipe: , in case you want to improve the sound and performance of your motorcycle.
• IMPORTANT: Do I need to buy anything else to mount it on my APRILIA RS4 125 11-16?: MANDATORY: Aprilia RS4 125 2011-2016: This 51509AO exhaust must be mounted with this link pipe: 11013KZ. Otherwise, you will not be able to mount the Arrow exhaust on your motorcycle.

Is the ARROW 51509AO exhaust homologated for the APRILIA RS4 125 11-16?

• Homologation for sound emissions DB(a): YES
• Homologation for CO2 gas emissions: YES

IMPORTANT:

• Aprilia RS4 125 2011-2016 : It is homologated for CO2 emissions provided you purchase the catalytic converter separately: 11013KZ, but it must be mounted with the associated accessory, otherwise it will not be homologated for CO2.
• Aprilia RS4 125 2011-2016 : It is homologated for CO2 emissions provided you purchase the catalytic converter separately: 11013KZ, but it must be mounted with the associated accessory, otherwise it will not be homologated for CO2.

Advantages of the Arrow 51509AO vs. original for your APRILIA RS4 125 11-16

• More Sound: +2 dB
• More Power: +2.00 HP
• More Torque: 1.18 Nm
• Less Weight: -3.00 Kg
• NOTES: Attention - The homologation is valid **only** with the **catalyst** included in the system.

What material is it made of?

The silencer body is made of aluminum, which allows the exhaust to be much lighter compared to steel. This material also dissipates heat more effectively, which contributes to improved performance. Aluminum is highly resistant to corrosion and has a shiny appearance.

Which motorcycles is the ARROW 51509AO compatible with?

• Aprilia RS4 125 2011-2016
• Aprilia RS4 125 2011-2016