Muffler ARROW Street Thunder Alu. KTM RC 125/ Duke 390i E3 2013-2016

Article information

THUNDER
Last generation of street bikes are made following a precise design and style idea, giving a fundamental importance in using the smaller exhaust systems possible, placed in some “non-conventional” position. These styling and design features have an impact also on after-market parts, to use the smallest exhausts possible. Arrow decided to use for several street bikes’ silencers a section initially designed for a completely different “world” and the Street-Thunder range was born.
Street Thunder silencers are available in titanium, carbon fiber and aluminum, with the endcap (with a fully renewed design) available in stainless steel or carbon. To compensate for the lower internal volume, research and tests have been done on racetracks and in Arrow’s R&D, looking for the better materials available in the market for noise reduction.
Street Thunder silencer are light and powerful, they are available as slip on systems or as a part of the full system (with Arrow collectors) and are available also in a street legal versions.

Thunder aluminum silencer:
- Body material: aluminum
- Rear end cap material: steel
- Internal silencer material: steel
- Muffler mounting: Steel clamp
- Body length (mm): 270.00
- Inlet diameter (mm): 54.00
- Outlet diameter (mm): 50.00
- Connection for CO sensor: NO
- Connection for oxygen sensor: NO
- Connection for a noise reducer: YES
- Weight (Kg): 1.93

PERFORMANCE
Stock:
390cc (Duke Version)
- Power: 42.00 HP / 8800 rpm
- Torque: 34.81 Nm / 6900 rpm
- Static noise level: 94 dB / 4750 rpm
390cc (RC Version)
- Power: 40.50 HP / 8700 rpm
- Torque: 34.13 Nm / 7100 rpm
- Static noise level: 92 dB / 4750 rpm

Arrow:
390cc (Duke Version)
- Power: 44 HP / 8800 rpm
- Torque: 37.27 Nm / 6900 rpm
- Static noise level: 96 dB / 4750 rpm
390cc (RC Version)
- Power: 42 HP / 8700 rpm
- Torque: 36.28 Nm / 7100 rpm
- Static noise level: 94 dB / 4750 rpm

Max gain:
390cc (Duke Version)
- Power: +2.00 HP
- Torque: 2.45Nm
- Static noise level: +2 dB
390cc (RC version)
- Power: +1.50 HP
- Torque: 2.16Nm
- Static noise level: +2 dB


Slip On System

With approval certificate.
EURO3 VERSION
KTM
125cc Type IS RC var.A2-A3-A4-A5
390cc Type IS RC var.A2-A3-A4-A5 / IS DUKE (C2/-, C3/-)

WARNING !!!
The ARROW Street Thunder silencer is only adaptable with Arrow exhaust collectors, CE approved with catalyst 71619KZ (RC Version) and 71600KZ (Duke Version), or with the Racing version 71619MI (RC Version) and 71600MI (Duke Version), it is not adaptable to the original collector.