Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Auto 16y8 - S20 manual swap

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Old Apr 30, 2026 | 01:45 AM
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Default Auto 16y8 - S20 manual swap

I believe I know everything I need for the swap, but would someone tell me a list of everything I need? I just want to be sure I have everything before I take the daily out of commission. I currently have the s20 - shift linkages - starter - axels - mount - clutch and flywheel.
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Old Apr 30, 2026 | 06:05 AM
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Default Re: Auto 16y8 - S20 manual swap

2 wire IACV if you swap ECUs. You can reuse your intake manifold if you drill and tap holes.

You can get by with the automatic ECU for the time being with the 3 wire original IACV
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Old May 1, 2026 | 12:43 PM
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Default Re: Auto 16y8 - S20 manual swap

clutch master cylinder and stainless steel braided line
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Old May 1, 2026 | 09:02 PM
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Default Re: Auto 16y8 - S20 manual swap

Don't forget all three pedal assemblies, the clutch slave cylinder and a C2 conversion harness. I would also get a complete manual Y8 intake manifold and Y8 manual ECU and move the black/blue wire at the ECU plug end to convert from a 3-wire IACV to a 2-wire one. You will also have to change the connector at the IACV end of the engine harness to plug into the manual IACV.
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