the seafoam shit works pretty good.... you might try pulling the egr valve off and running a coat hanger or something through the egr passages in the manifold to bust that shit out of there. you will want to clean all those chunks of carbon out of the manifold after you knock them off. also clean the egr valve.. as for the removal of the manifold. you will need a childs sized arm because without a hoist, getting the lower bolts and the brackets off will be a BIG pain in the sack. ive done two heads on the integras, and i thought that the intake manifold was the hardest part. the bolts on the bottom are very trick to get.