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Thread: Eibach ProKit, bad ride quality. Any idea why?

  1. #1
    Registered Member

    Mazda Protege 5 (2003)

    Join Date
    Jul 2012
    Puerto Rico

    Eibach ProKit, bad ride quality. Any idea why?

    I recently installed new struts, boots, and Eibach Springs. I love the way my protege5 sits now but the rear seems overly "soft". The ride is bouncy in my opinion and others feel the same when they ride with me. My bump stops were destroyed so I bought KYB boots+bump for the front and moog for the rears (kyb wasn't available). Nothing was cut since the instructions didn't say to and Eibach apparently doesn't recommend it. Also I might have installed the bumps upside down (not sure if it makes a difference but flat part towards the flat part of the shock). Anyone else on Eibach feel the ride is pretty bad versus OEM? I'm on 205/45/16 tire...

  2. #2
    Team Pro5 Jackie chan's Avatar


    Join Date
    Mar 2011
    Seattle, WA
    My eibachs were great, didn't trim the bumpstops either.

    Sent from my SM-G900T using Tapatalk

  3. #3
    Registered Member Ilikebikes's Avatar

    02 P5

    Join Date
    Jul 2015
    Northern California
    How long have you had them on? Sometimes it takes a bit for things to "settle"

  4. #4
    Registered Member

    BJII Astina SP20

    Join Date
    Apr 2016
    What shocks did you install? No point installing Eibach springs with cheap shocks.

  5. #5
    I break stuff. Preferio's Avatar
    Donated: $1.67

    2003 Mazdaspeed Protege 1660, 2004 Winning Blue RX8, 2005 Mazda6

    Join Date
    Mar 2011
    Knoxville, Tn
    I'm curious what struts you installed, too.

    My Eibachs were great on my MSP.
    ASE Certifications: A1, A4, A5, A8, C1, P2
    Mitsubishi-Fuso: Electr. Cert. 1, 2, 3 and 4

    2007 Mazdaspeed 3: Takeda Intake, JBR RMM, JBR 125 RSB, G-Plus TIH, eBay 'race pipe', Cobb APV2 Stage 1 + SF OTS

    2005 Mazda 6 S: Stock

    2004 Mazda RX8: AP midpipe

    2003 Mazdaspeed Protege #1660:
    Wiseco 8.8:1 pistons, Molnar rods, ARP head & main studs, AWR race pan, 10an oil return, Garrett BB GT28R, AWR 88 duro Front/Rear/Trans. mounts, Eibach pro springs/Tokico Illuminas, CXRacing FMIC w/ 2.5" polished hard pipes, GReddy BOV, APSX Wideband, Glowshift Boost/Vacuum Gauge, Glowshift Oil Pressure Gauge, single DIN triple gauge panel, ACT Xtreme Clutch, 440cc injectors, Split Second AFC V1, Mishimoto radiator, shroud and cap w/ gauge, NXS MBC (16psi), Pope Downpipe, 3" catless, single-resonated exhaust, poly exhaust hangers, 6000K HIDs, MSM Nardi steering wheel, 03.5 spoiler

    2003 Protege5: Injen Intake

    2002 Mazda Protege5: Beat-up beater on crappy springs, exhaust and shifter.

  6. #6
    Registered Member

    Mazda Protege 5 (2003)

    Join Date
    Jul 2012
    Puerto Rico
    Removed some crappy Stagg and went to KYB Excel (black), I know they aren't tokico or anything high end but I had them on stock springs and felt pretty nice. The Eibach have been on for about a month, so about 500+ miles.

  7. #7
    Certified Mazda Tech hornsfan10609's Avatar

    2003.5 Mazdaspeed Protege x2

    Join Date
    Jun 2009
    Austin, Tx
    Did you get the specific P5 Eibach springs or Protege sedan springs? The P5 rear springs have a higher spring rate, due to having a much heavier rear end.
    Mod List. "Jinba Ittai"

    2003.5 Titanium Mazdaspeed Protege #1345 Purchased 7/20/10
    2003.5 Titanium Mazdaspeed Protege #1574 Purchased 10/25/14

    2009 Highland Green Mustang Bullitt #5998 12.9@110
    2002 Red Protege5 RIP:4/25/10

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