ENJOY make sure you watch in HD 1080!! LIKE AND SUBSCRIBE FOR MORE!!! Two Brothers Slip-on system for the R1 and R1M, eliminates the cat to increase horsepower and torque, and sounds super mean. View it online at . Here we do a sound check on our customers stock exhaust VS the genuine Yamaha Akropovic slip on! Needless to say, the customer was very happy! Yamaha YZF-R1M 2015 Dyno Test with Akrapovič Exhaust. Wanting the ultimate exhaust setup for your 2015Yamaha YZF-R1/R1M? Well look no further! This Complete Soundcheck will give you a true example of how .
