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Hybrid Racing


Hybrid Racing Clutch Master Cylinder Upgrade - 02-06 RSX (DC5) / 06-15 Civic Si (FA/FB/FG) / 04-08 TSX (CL9)

WARNING: Cancer and Reproductive Harm

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Ships in 1-5 Business Days

Factory clutch master cylinders in the 06-15 Civic's are known to be rather unreliable and because of their poor design and quality, it can lead to premature failures of critical parts throughout the drivetrain.

High RPM grinds are mostly attributed to the OE master cylinders' inability to transfer fluid effectively to the slave cylinder, thus causing grinding and rasping of the gears and synchros since the clutch disk hasn’t fully disengaged.

Upgrading the clutch master cylinder and clutch line to Hybrid's EM1 kit changes the system to an older, more direct and efficient system. This improvement allows the driver to feel a more consistent and direct clutch pedal which also improves shifting at high RPMs.

Read through Hybrid's instructions to get an idea of what it takes to get your gear change issues fixed once and for all. Also, consider upgrading your shifter cables or cable bushings for an even more direct and crisp gear change.

You will need to swap out the OEM rod & clevis


  • Helps to eliminate grinds during hard shifts
  • OEM Honda master cylinder
  • Stainless steel braided clutch line
  • Improves the feel of gear changes

Vehicle Fitment

  • 02-05 Civic Si
  • 06-11 Civic Si
  • 12-15 Civic Si
  • 02-06 Acura RSX M/T (all)
  • 04-08 Acura TSX M/T
  • Does not fit RHD cars!

Note:  other adjustments to the pedal may be required after installation. Swapping of your existing OEM CMC rod + clevis may be required.

Install Guide