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Exhaust Torque Valve Insert SR500 XT500 & TT500 2-089

High Performance Torque Valve

  • For more torque and power, but at lower RPM, resulting in top performance.
  • Feel an immediate difference in low end TORQUE and POWER without taking anything away from the top end!
  • See photo graph for SAE corrected horsepower using a stock 1979 SR500, which achieved a 3.5-4 horse power gain! 
Applications: YAMAHA e.g. between cylinder and header pipe
SR400
SR500
XT500
TT500