High-torque exhaust in a subtle design. Provides considerably more top speed. E-certified. For those who need a new exhaust and want more power but do not want to ride with a small and particularly sporty sounding exhaust on their scooter. very good torque curve and excellent performance on 50cc and 70cc Sports cylinder. This Tecnigas Silent Pro exhaust system fits on Honda Bali 50, SFX50 and SXR50 Note. The exhaust has an E-certification when restricted, meaning it can easily be used as a stock replacement without power increase.