If i drop a b18b into my civic how much of a gap will i have to fill to connect the headers to my catalytic converter, actually it's a test pipe now hehe, but the test pipe has the same size flange fits just fine on d16 now.

 

If it's an EX, it'll bolt up directly.

 

well the motor will be coming with the mounts off of the 94-01 integra they took the motor out of, so i'm wondering if i CAN bolt up a b18b with stock b18b mounts, and what kinda of gap i'll have, or if my question was just answered above. soory i forgot to mention i dont have b18 into 95 coupe engine swap mounts, so again all i have are the stock d16 mounts and the mounts that will come with the ls motor i get...thanks for your guys' time....adjustable test pipe on this civic a well

 

Is this an exhaust question or a motorswap question?

 

Yes stock integra mounts will work fine with no problem.When I first did my ls swap I still had my stock cx exhaust and there was no gap but it didn't bolt up,so I had to take it to a muffler shop and have them drill holes so that it will bolt up,but then when I put a si exhaust and my current exhaust bolted up fine no problem,so it depends if you have a EX or DX