I have a B18A1 in my CRX, does it matter if I use a header for a 90-91 or a 92-93 header? I don't know what year my engine is from (anyone got a block decoder or something?).

 

Bueller.

 

Header for a 90-91 what? Header for a 92-93 what? You have a B18 so you are going to need a header that was made for a B18. I am not sure if a B16 header will fit but any B18 header should.

 

Any B series header will bolt up to the head.

 

For the engine year of the Integra. 90-91 and 92-93 are designed differently in their lengths, not their port arrangement to the head. I'm wondering which is a better choice to use in a CRX. I don't believe a GSR header will fit, I'm not sure on a B16 or C5.

 

If you are using OBD0 (90-91) Integra ecu, use the 90-91 style B18A1 header with the o2 port in the front..