Exhaust Torque Valve Insert SR400 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