Car is a 00 Civic Si, and I'm about to put in a chipped OBD1 Ecu.

I also want to get a test pipe, but I heard it will throw a CEL because of the second o2 sensor. Is this true? Will it still happen with the obd1 ecu, or only with the stock p2t?

Also, it is a 2.5'' test pipe, do you think it will fit my Apexi WS2 catback?

Thanks all help appreciated

 

Obd 1 ecu's only look for 1 o2 sensor so you wont throw a code

 

Sweet, thanks!