I have a matched pair (originally from the same engine) of Cosmo 13b turbo rotor housings. I was going to sell them via Ebay and thought they were usable on a FD, except for the ports being a bit different are there any deal breakers between them?? Searching didn't really help as much as I hoped.

 

As far as I know, they should work just fine. They're dimensionally the same. I think the only weirdness could be if the plug timing was different - as in, where the spark plugs physically are in the housing.

Not a hard, definitive answer, but rotor housings are pretty much swappable, save for the 12a rotor housings of course.

Dale

 

Don't. Exhaust port sleeve is better in the FD.