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Our HA Motorsports / Apollo Tuning OBD1 Honda Coil on Plug Conversion board fits into the stock OBD1 Honda ECU. The board fits where the knock board is on ECUs with knock sensor circuitry. This is the COP board only. If you need a complete kit with wiring, see our COP conversion kit. Features Compatible with B/D/H/F series Works on stock and chipped/Hondata ECUs Allows for better spark, bigger plug gaps, and no more moving parts for improved reliability. Near-stock cranking time unlike some other COP kits Compatible with most smart coils - K20/24, D17, J32/35/37, AEM, and many others. Can also be used to drive a CDI controller. Automotive grade components What ECUs is this compatible with? This is compatible with any USDM OBD1 Honda ECU. You do not need to have a chipped or tuned ECU to use this. What coil packs should I use? K series coil packs are the most popular. We only recommend genuine DENSO coil packs. You will also need a plate to retain them. See our coil mounting plates. Installation instructions
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🇺🇸 Ship from USA · On Agora since 2026
$149.99