06-11 & 12-15 Honda Civic Si EM1 Nissin CMC & Stainless Steel Clutch Line Upgrade

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  • HARDmotion Heavy Duty Rubber Coated Stainless Steel Line & Nissin EM1 CMC
  • HARDmotion Heavy Duty Performance Slave Cylinder for K-Series
  • Nissin Em1 Clutch Master Cylinder
  • 06-11 12-15 Honda Civic Si Clutch Master Cylinder Upgrade EM1 Nissin CMC
  • EM1 CMC Install
$139.00 - $208.98


HARDmotion K-Series EM1 CMC & HD Slave Kit V2.0 "2nd gear grind fix"

The HARDmotion 06-11 / 12-15 Civic Si & Acura RSX EM1 CMC & Stainless steel clutch line kit. The kit starts with a OEM EM1 Nissin CMC, the reason for this unit is two things. One the nissin em1 is the most prooven and reliable cmc you can install on your car. They last and wont fail on you like other units can. Two it doesnt have any delay valves built into it and thats the core reason for switching to this unit. This allows the clutch pedal to engage and disengage the transmission at the optimal speed so grinding wont incur. The CMC is then fitted to our upgraded stainless steel clutch line and that comes with all fittings needed to adapt the line. This clutch line is also a step above most with a stainless steel clutch line, that is a heavy duty unit thats built to last along with a rubber coating (to prevent dirt from the engine bay getting into an exposed steel wrap and wearing it or bursting it).

Finally we round out our kit with the new HARDmotion Slave Cylinder, this is the final piece to the puzzle of fixing any grind issues. The main piece that connects to the transmission is the slave. As our vehicles age the stock cmc and slave become worn and need replacing and they dont function as well. Thats why we now suggest getting our upgraded k-series slave cylinder. This unit not only is built to last as well but doesnt contain any delay valves. Yet again the main purpose of any hope of fixing your shift is removing the delay valves. This unit was built totally with that and mind and was built without any delay valve. Upgraded all around for performance.

With all of this combined you will enjoy proper shifting, engagement and release of the clutch, even under high rpm aggressive driving where it really counts. Not only that but this helps protect your transmission and synchros.

"If you are grinding any gears, having difficulty shifting, slow shifts or get completely locked out during a high rpm shift. This is the solution." -- HARDmotion Team

How does it work? The factory has two delay valves in the cmc and the slave. We use a cmc and slave that are high quality long lasting and that do not contain these delay valves. The delay valves in the oem units are built to make the clutch pedal less dramatic when it grabs. The drawback is the transmission and clutch do not disconnect fast enough at high rpm with the oem units and you get a grind. With our upgraded units as a system it allows the clutch to disengage properly and quickly (just like honda used to make it) why we are using a em1 cmc and our own slave unit which are built to function properly and alleviate the grinding issue and increase the overall performance and feel. These units once installed made a dramatic difference on every car we have tested it in personally. We have dealerships who use this on customer cars and honda certified master techs who also agree this solution works. We have sold over 300+ units and we constantly get recommendations as the best kit out.

Why choose our kit over others? Our kit is way more affordable than our competitors and comes with the same if not better parts + free shipping. Your saving over $50 dollars and getting a higher quality SS line at the same time and you get the proper parts and slave that complete the system as a whole. The problem is most people just do the CMC only, when the slave is the actual final piece that connects to the trans. If one or the other isnt working and isnt working fast you will get grinds. The other reason to choose our kits, is they just dont fail. They just literally dont and we guarantee and back it with a no hassle warranty.

We guarantee it will work!: You wont find this anywhere else and backed with a satisfaction guarantee. If it doesnt work, we will refund your money in full.

1. Nissin EM1 CMC (clutch master cylinder)
2. Heavy Duty Rubber Coated Stainless Line & Specialized Fittings
3. HARDmotion HD Slave Cylinder (optional & highly recommended)

Q & A:

1. Does this fix second gear lockout, misshifts or high rpm shift grind? YES!
2. Is everything included for the swap? Yes, every fitting, line and part is included in this kit.
3. Do you ship to canada and puerto rico? Yes we do, FREE Shipping.
4. Does this help protect the transmission? Yes this helps protect your synchros from getting damaged!
5. Is this a must have modification? In our opinion yes every single k-series motor that has issues shifting should swap over to prevent major mechanical damage.

For install instructions & help. Please scroll down below for information and pointers.

8th gen Civic: 2006 2007 2008 2009 2010 2011 Civic Si
9th gen Civic: 2012 2013 2014 2015 Civic Si
Acura RSX: 2002 2003 2004 2005 2005 Base & Type-S (manual)
Acura TSX (Manual)

Installation Help: The EM1 CMC basics you need to know.

1. The HARDmotion EM1 clutch master cylinder (cmc) needs to be taken apart. From there upon uninstalling your stock CMC.
2. Take apart your your stock clutch master cylinder internals inside the HARDmotion em1 housing.
3. Swap over most importantly the rod from your oem cmc to the HARDmotion em1 cmc. View diagram below.
4. Here is a diagram below on one way to install the guts of the new HARDmotion EM1 CMC. You are swapping the rod, nut and bracket over.

5. Once your new HARDmotion CMC is assembled. Reinstall into vehicle.
6. Stainless line will attach to the EM1 Via the right angle, the other straight line connection goes to the slave unit.
7. Bleeding. You are receiving a dry brand new nissin CMC, the same that honda uses for the OEM vehicles. You may have trouble bleeding or getting pedal pressure the first time. What you need to do which a lot of people are successful with is "bench bleed" the cmc.
This information is all over the internet with videos and tutorials on how to do so. Another method is using a vaccum bleeder.
8. Once complete test free play and ensure that there is about 1 inch of freeplay. Freeplay is the pressureless zone of the clutch pedal to where its easy to press down before it starts to stiffen where engagement starts. This is important so your clutch can properly disengage.
How hard is it?: Everyone has been able to install this item themselves. It can take from 1-2 hours if proper preparation and bleeding is done.
Final Notes: Be sure to watch youtube for diys on this mod, even videos. Simply searching "diy em1 cmc install" usually pulls up lots of pages which will help assist you.
We know there are many ways to go about it, so we allow you to find what works best for you. Just be sure to take your time with understanding and bleeding the system and knowing to swap the internals beforehand. This job is very similiar to a cmc and slave install and reinstall. Also the stainless line makes it easier to install.


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35 Reviews

  • 5


    Posted by Kurt Dorthe on Aug 6th 2023

    Easy install. Positive and progressive feel. Eliminated the woes of the delay valves. Quality parts. The customer service was bar none, and I will always check their site for my needs before anywhere else from here forward. Thank you Hard Motion

  • 5

    EM1 CMC

    Posted by Samuel on May 29th 2021

    Works great, my previous unknown brand after market that was in the car when bought it started to fail to work properly so that's an upgrade for sure

  • 5

    Hardmotion cmc kit best on the market!

    Posted by ricky munoz on Aug 17th 2020

    Best complete kit on the market! Ordered this kit for the past 3 civics and never failed,easy to install and complete! Do not hesitate to purchase from Hardmotion!

  • 5

    Well worth the money and time !

    Posted by Oscar S. on Jul 2nd 2020

    This should of been my first mod to my 8th Gen Si ! Feels like the transmission is unlocked and no more lockouts , grinds , and now you can shift with confidence. The install is a bit of a process but once your done it is a night and day difference ! Hardmotion provides the Kit to get the job done ! Have a friend help you with the clutch bleeding and your good to go ! First couple days with it , I am impressed ! Despite everyone on your forum groups or FB groups , posting different opinions . Do it yourself and follow the steps , you should be fine ! This is a must do ! If you’re tired of grinding gears and 1st to 2nd lockout . This should be your first mod to your Si !

  • 5

    Posted by Unknown on Jun 29th 2020

    cmc feels way better than factory cmc. i was able to shift better with HM kit. good job guys!

  • 4

    Great product

    Posted by Eddie on Jun 13th 2020

    So far the hard motion cmc and slave are working well no leaks clutch engages well and no grinds. However, it’s far from perfect. After adjusting the cmc and clutch pedal, I now notice a vibration coming from the clutch pedal and I am unsure on how to alleviate this issue. I’ve read some forums that say it is because the stock setup would dampen the vibrations. I do have the line secured with ties, so I’m wondering what is the cause and how to eliminate it.

  • 5

    works really great

    Posted by Andrew Xiong on Mar 7th 2020

    I love this cmc that deletes the delay valve I can now shift from 1st to 2nd gear at high rpms without grinds or gear lockouts I love it, only thing is that it took awhile for me to receive it other than that if you’re having 2nd gear grinds or lockouts I highly recommend buying this along with the ad on HD Slave cylinder

  • 5

    perfect combo with the HD slave

    Posted by Unknown on Sep 26th 2019

    Probably the best kit on the market,don’t waste your time with these other kits! Shipping was lightning fast and communication was on point!

  • 5

    amazing product

    Posted by Alex on Jun 28th 2019

    Super quick shipping the hybrid clutch master cylinder slave cylinder and line is seriously a must if you have a 8th gen si especially gone to the oem cmc no more delay valve im super happy should’ve gotten it sooner

  • 5

    best CMC and HD slave there is!!

    Posted by Kim C. on Apr 29th 2019

    Lately i was having issues with my shifting..hard to get into gears and grinding issues especially 2nd and 3rd gears at high rpm..did my reviews and homework i decided to get the em1 cmc combo with hd slave instead of ktuned cmc and slave..heard alot of bad reviews about ktuned cmc and slave and by far this is the best decision i’ve made..smooth clutch, shifting is awesome and bye bye grinding..i recommend this product to all 06-11 civic si owners!!

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