D16y4 extractors onto D16a/ZC

has anyone fitted the ebay style D16y4 headers onto a ZC crx motor before?
I kno D series headers should all line but up has anyone actualy fitted these extractors onto a CRX before and can shed some light?

are there any issues ie exctractors not meeting up with cat, touching of the oil sump etc

they fit fine the only thing u have to do if you are bothered is that the exhaust manifold ports that connect up to the head are a little bit smaller just get the dremel out and sand them down if u want a little bit extra power i never bothered though