If i were to attempt a swap into a 95 civic EX with a b18c1 engine, would i need to buy a new exhaust and air intake or would the stock ones attach easily? Thanks.

 

The header would be different but the catback would be fine. Not sure about the inlet on the intake fitting on the c1 intake mani, but it probably will. Intake is just a piece of piping and a filter so you should be able to make it work no problem.

 

Intake diameter will be different and pipe will need to be different too since the intake on the GSR motor is curved differently.

Exhaust will probably need to be tweaked.

 

would it be easier for me to just buy a new catback, headers and cold air intake?

 

The catback should be fine. The header and intake will need to be replaced. You're not changing anything structurally to the car so the catback would not be changed. That is unless the header aimed a different direction, but I don't believe it does. I've never done a b series swap before though haha.