i am doing a b16 swap into my 89 crx si. the downpipe from the b16 doesn't match up to my catalytic converter. the two bolts that hold it together dont match up. what have you all done to get this to work?

 

99-00 Si Downpipe!
or buy a DC Header that fits a 99-00 Si

vnt

 

He already has the b16a header and a header made for a b16a will be the same length.

You can get some length welded to your stock b-pipe (the big long exhaust pipe) so that the cat will mate with the collector.

Also, what you're talking about (the bottom piece of the stock header) is called the a-pipe. If you start calling it a downpipe, people will think you have a turbo.

 

take your car to the muffler shop and they can cut and reposition the flange on the cat converter to line up with the downpipe

 

Question?: is this a common problem with b16a's into crx's.. I need to know.. doing swap soon.