From a Yoshimura press release:


Yoshimura knows the YamahaYZF-R1. With feed back from racers around the world including the Westby Yamalube team, we have built a masterpiece Alpha-T 3/4 race system that makes the new 998cc Yamaha R1 come alive! As soon as you install our new AlphaT 3/4 race system you will notice the one of a kind sound that the Yamaha crossplane engine and Yoshimuras Alpha T muffler make – pure music!

Peak horsepower is up almost 5HP and peak torque is improved by almost 5lbs. with the new Alpha T 3/4 system. Great weight savings are realized as well: Over 12 pounds less than stock with the Alpha-T 3/4 Ti system!

  • The lightest 3/4 system we build for the Yamaha R1
  • More aggressive sound profile
  • Made with our exclusive Works Finish

The all-new Alpha-T comes complete with a carbon fiber heat shield, and available in either stainless steel or titanium Works Finish. Proudly made in the USA!

2016 Yamaha R1 Alpha-T 3QTR Race Series system in titanium

2016 Yamaha R1 Alpha-T 3QTR Race Series system in titanium

2016 Yamaha R1 Alpha-T 3QTR Race Series system in titanium

2016 Yamaha R1 Alpha-T 3QTR Race Series system in titanium

The beauty of the Alpha T muffler in Works Finish titanium

The beauty of the Alpha T muffler in Works Finish titanium

Dyno

2015-16 Yamaha R1 Race Alpha-T 3QTR SS/SS/CF WF

Part #13141CP520
MSRP: $919.00
QUALIFIED MANUFACTURER DECLARED “MODIFIED PART”
FOR CLOSED COURSE COMPETITION ONLY;
NOT INTENDED FOR STREET USE.
2015-16 Yamaha R1 Race Alpha-T 3QTR TI/TI/CF WF

Part #13141NP720
MSRP: $1469.00
QUALIFIED MANUFACTURER DECLARED “MODIFIED PART”
FOR CLOSED COURSE COMPETITION ONLY;
NOT INTENDED FOR STREET USE.
Stock weight: 18.3 Lbs.
Alpha-T weight stainless steel: 8.0 Lbs
Alpha-T weight titanium: 5.7 Lbs.