Review on 🏍️ M4 14-17 Yamaha FZ-09 Standard Slip-On Exhaust: Enhance Performance with Carbon Fiber Construction by Keith Aluguvelli

Love it. I cut it off before welding, not after, so I didn't have to sand and there were no leaks. I installed gravesmog block plates to remove the AIS so there are no popping noises. I also contacted the m4 and they said it doesn't need tuning and it won't hurt it but it will benefit in terms of performance. So I'll leave it alone, this bike is strong enough anyway so I don't think I need a few extra ponies for $200 or more.