I am running them on my blower car-ported, polished, and cut for o-rings + wire-loc gaskets. I have a GT40 intake 1.6 FMS roller rockers and e-cam. The heads work well but for the weight savings and detonation protection, go with aluminums, especially with all the choices out there today. Aluminum offerings were not nearly as plentiful when I set my car up. Trick Flow makes a nice set, but you really can't go wrong with any well known manufacturer. Just make sure they are setup for emissions and you'll be set.
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