I have a 88 crx si with a 91 integra ls motor (b18a1). It needs a header , a down pipe that will clear the oil pan, a cat, and a cat back exhaust. If anyone has this set up can you please tell me what will fit on this crx? Any help would be appreciated.

 

buy a 91 integra header, like a dc sports or something. and for the cat go to a muffler shop and haave them make u a straight pipe. and well buy a catback system

 

On my B18b swap, I'm using a 97 GSR (stock cast iron and tube) tri-y exhaust. Carsound 2-1/4 cat with a greddy mx catback. I like it. Use muffler shop to weld cat to stock flanges. One thing to look out for on the header, the LS header is longer on the collector end, GSR is shorter. So if you use the GSR system, or aftermarket header, the cat adapter will need to be longer. You could use the stock Si cat and exhaust, I think the LS will bolt up, but the GSR is too short.
HTH
chris

 

If you want factory then use the LS exhaust manifold and the d16 downpipe. They bolt right up adn will bolt to your stock cat.