B20b Swap help!
Hello guys... im having some b20 problems... so i installed this b20 in my 1990 civic wagon and need help with getting it to pass smog at the BAR in sacramento... i know your going to say the motor is illegal but they said i could keep the swap but need it to pass smog and should have all the emissions for a 91 integra... i have all the integra parts and now im having issues... the stock exhaust manafold for the b20 has no pod for an o2 sensor... what exhaust manifold will mount up to the b20 that will have a spot for the o2? Also if i cant get any codes to pop up when scanning what should i do? The guys from the BAR said they hooked it up to scan and nothing would happen like the wires were not connected to anything. Thanks for your help!
Brandon
Brandon
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Neptronix
Acura Integra
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Feb 13, 2026 06:50 PM




