Will OEM rear disc brake on its trailing arm from a 1999-2000 Civic Si fit a Honda Civic EK (1996-2000)?
Added · Updated
Short answer: Yes, with extra parts or work Limited
Verdict:Fits with mods Limited confidence (1 of 3) · 3 sources
Yes, with extra parts or work: Honda's 1999 press release gives the Si four-wheel discs.
Safety-critical part. Manufacturer sources are cited, but they disagree or are incomplete for this fitment, so this entry is held below "Confirmed". Have the work done or checked by a qualified professional and confirm figures and part numbers against the service manual or the manufacturer.
| Part | OEM rear disc brake on its trailing arm from a 1999-2000 Civic Si |
|---|---|
| Vehicle | Honda Civic EK (1996-2000) |
| Years | 1996-2000 |
| Trim / condition | drum-brake EK; swap the whole trailing arm |
| Verdict | Fits with mods Fits with extra parts or work |
| Confidence | Limited 1 of 3 — Forum, Reddit or anecdotal report, or ambiguous/partial detail. Treat as a lead to research. |
| Last verified | 2026-10-26 (date the cited sources were last read) |
Details
Honda's 1999 press release gives the Si four-wheel discs. Forum owners say disc trailing arms bolt onto drum EKs; the swap also needs Si rear brake lines and disc-type parking brake cables, and a Si proportioning valve is recommended but not strictly needed (EG-side sources call it needed; see F-eg-16). Bolts are often seized.
Specs
- rear rotor: 9.4 in. (Honda 1999 press release)
Related build entries
Other brakes fitment for the EK
- OEM rear disc brake on its trailing arm (hub, caliper, rotor 42510-SR3-A11) from a Civic del Sol Si / VTEC — Fits with extra parts or work Fits with mods
- OEM rear disc trailing arm assembly from a 1994-01 Integra (non-Type R) — Fits with extra parts or work Fits with mods
- OEM front brakes (rotor, caliper, bracket) from a 1999-2000 Civic Si — Unclear — details missing Unclear
More for this car
- All Honda Civic EK (1996-2000) fitment answers · EK common problems
- Newsletter archive: past issues with every new and corrected entry
Sources
- 1999 Honda Civic Si press release (Feb. 10, 1999): engine, chassis, wheel and brake details — Honda press release, reproduced by The Auto Channel (mfr spec; read 2026-10-26; full page read)Si has four-wheel discs.
- 98 Civic rear disc brake conversion part list — Honda-Tech forum (forum thread; read 2026-10-26; full page read)
- 92-95 rear drum/disk trailing arm question(s) — Honda-Tech forum (forum thread; read 2026-10-26; full page read)
Summaries are in our own words. Fitment is not guaranteed — disclaimer.
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