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Old 02-13-2017, 05:46 AM   #1
Koopa Troopa
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Clutch master cylinder difference between RHD and LHD

Not sure where to put this, but I figured I'd spread the word so other people don't make the same mistake I did. I don't know if it's the same on the Aussie market cars, but the JDM mounting points of the clutch master cylinder are 75mm (measured from center to center) and the USDM mounting points are 80mm. The EG6 master cylinder I have in my shop is also 80mm.

TLDR: Don't buy a USDM clutch master cylinder for your JDM car because it will not fit.

More detail: My clutch master cylinder took a shit, so I did what any person of intelligence would do. I bought a 7th gen Civic clutch master cylinder part number 46920-S5A-G06 to replace my DC5 master. Turns out the mounting points on USDM master cylinders are wider, and even if they were the same size, the overall unit is longer than the JDM DC5 master. I have a Japanese 7th gen Civic master in the mail, and I will update this thread on whether or not the JDM 7th gen Civic master works on the DC5. I will also include photos once I have all the clutch master cylinders on hand.

From left to right:
JDM 7th gen Civic Ferio, JDM Integra Type R, USDM 7th gen Civic


EM2 Master cylinder mounting width


JDM DC5 ITR master cylinder width. Oops, didn't realize the caliper wasn't on the master cylinder when I took the picture. Anyways, it's 75mm center to center.


JDM Civic Ferio width. 75mm which is the same as the DC5


The pedal arm width between the USDM RSX and the JDM cars is also different.
Civic Ferio and JDM DC5 ITR have a pedal arm width of 9mm


And the RSX/ 7th gen Civic has a pedal arm width of 7mm.


The part number on the right (46920-S5A-J06) is the one you need to order if you have a RHD car with a 75mm mounting hole width.

Last edited by Koopa Troopa; 02-21-2017 at 06:23 AM..
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Old 02-21-2017, 04:46 AM   #2
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Old 02-21-2017, 06:22 AM   #3
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Updated first post with pictures and stuff.
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