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Project EP3 Civic Si: Suspension Upgrades with Whiteline!

  • Mike Kojima

,

These end links are for the front and rear Whiteline sway bars. They use a solid ball joint and replace the stock rubber-bushed parts.

These are Whiteline’s universal swaybar end links that have a cut-to-fit middle section. If our lower arms cause the bar to bind, we will use these to make a super short end link. It turns out that we didn’t need them, but they are a good part to have around for situations like that.

Howard first got ready to remove the rear knuckle off of the rear suspension. The EP3 is unusual in that a lot of the rear link bushings are located in the knuckle itself.

The knuckle is removed.

Howard then used a hydraulic press to push all of the stock rubber bushings out of the knuckle.

 

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17 comments
  1. G says:
    October 6, 2018 at 4:57 pm

    Can I have part numbers for those bushing front and back

    Reply
  2. Ian says:
    March 7, 2019 at 11:59 am

    Here you go!

    https://whitelineperformance.com/collections/all/2004-honda-civic-si-esi3696722

    Reply
  3. David E. says:
    March 18, 2019 at 10:33 am

    I installed the Whiteline RSB this weekend. WOW, I did not expect the dramatic difference in balance it would make. It really improved the car’s handling on the old stock suspension with +135k miles on it. Greatly reduced the plowing effect and the car will actually rotate now when pushed hard! Also seems to have fixed the weak rebound I was experiencing in the rear [but didn’t notice until now]. I love it!

    One question, the instructions from Whiteline said to sandwich washers between the bar and the endlink inner nut and locknut. Did you guys also do this? I’m using Hardrace rear endlinks and with washers in place the bolt is barely long enough to clear the width of the locknut, full thread engagement on the nut, but no extra threads left sticking out. I understand not having the nuts eat into the RSB, maybe I just need thinner washers?

    Reply
  4. ALFREDO NEW FLORES says:
    September 30, 2019 at 3:39 pm

    2005 Honda Civic Si project. I want to upgrade the suspension on my 05 Honda to improve handling using the parts on your webpage. Can u provide a list of the items I will need to do the upgrade. Can I come in to pick up the parts for purchase? I would like to get the parts asap and come in to get them. I live locally in SoCal. Please advise.

    Reply
  5. David Detrick says:
    April 22, 2020 at 5:36 pm

    Reference EP3 Suspension Project. 30:41 video. WOW, I’m blown away! Not super mechanically inclined, but after spending a good amount of time researching, still can’t figure out whiteline special? bushing part numbers for the 12:06 time in the video (2 items), and 12:08 time (4 items) ? PLEASE PLEASE assist.
    Thank You for helping ALL the EP3 enthusuiasts ! You are the BEST ! Thank You Mike Kojima and the team! HUGE support for us Yes, I’m doing the majority of this project ! Super Excited

    Reply
    1. Charles Warren says:
      June 10, 2020 at 8:02 am

      At 12:06, those are the KCA424 bushings – https://whitelineperformance.com/products/kca424-bushing-kit
      At 12:08, those are the W63381 bushings. They only seem to be in stock on the UK website -https://ukwhitelineperformance.com/collections/all/products/w63381-bushing-kit

      Maybe because these chassis are not the most popular, it seems that Whiteline might not have the stock like they did when the Moto IQ video was made. It might be worth contacting someone at Whiteline to see what their actual availability on these parts is.

      Just purchased an EP2 here in Europe after owning an EM2 in the US and hope to make some of these improvements myself.

      Reply
  6. Eric M says:
    June 12, 2020 at 3:39 am

    Charles, the W63381 bushing is for the rear lateral arm the video has some photo discrepancies. I think David was looking for the 2 bushings being pointed a few seconds earlier in the video. If that is the case then I believe he is looking for the 2 front lower control arm bushings. He’ll have to confirm for us that’s what hes after.

    As for W63381 being sold out I think the main reason they are possibly discontinued is the abundance affordable aftermarket arms that replace the thin oem arms like these https://www.kseriesparts.com/HDR-6615.html

    Reply
  7. chris says:
    May 8, 2023 at 10:58 am

    read the whole article on this website, and have watched the video several times over. i purchased the whiteline camber bolts for my front suspension on my 2005 honda civc si. per the whiteline doc that came with the bolts i installed them on the upper strut damper bolt. and put the apex of the lobe pointing to the inside of the engine bay for a `A` camber effect.

    is this how yall installed the bolts? i did not see any video footage in the youtube video of the bolts installed and their orientation nor did i see any pictures of the bolts within this 7 page article. look forward to your response.

    Reply
    1. Avatar photo Mike Kojima says:
      May 8, 2023 at 12:05 pm

      You install them in the orientation to get the adjustment you need.

      Reply
  8. blackbart says:
    September 1, 2023 at 5:57 am

    hey Mike, if I farm out this project to a local mechanic, how many hours of labor roughly speaking do you think all of this requires? and roughly the cost of parts?

    Reply
    1. Avatar photo Mike Kojima says:
      September 1, 2023 at 7:11 am

      I would ask your mechanic not me, google is your friend.

      Reply
  9. Andre says:
    January 16, 2024 at 7:06 pm

    Good day
    In regards to the trailing arm bushings, it was mentioned that they used the OEM rubber trailing arm bushings, but what about the harden rubber trailing arm bushings from hard race or the powerflex trailing arm bushings

    Reply
    1. Avatar photo Mike Kojima says:
      January 16, 2024 at 7:25 pm

      Those are good.

      Reply
      1. Andre says:
        January 17, 2024 at 7:36 am

        Would using those bushings cause binding? Or negatively affect the ride quality ?

        Reply
        1. Avatar photo Mike Kojima says:
          January 17, 2024 at 10:03 am

          No not much.

          Reply
  10. Jacob says:
    August 14, 2024 at 6:00 am

    Is there a complete parts list for this project?

    Reply
    1. Cody says:
      January 22, 2025 at 5:58 pm

      I was wondering that too. All the parts needed are very scattered. Wonderful write up, just makes you really work to find everything

      Reply

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