mainly here cause it IS the best. h:
www.jdmcivic.com
www.jdmuniverse.com (somewhat)
www.honda-tech.com
www.streettuners.com (haven't in a while)
www.alabamaracingscene.com (pretty gay - local board)
www.cars-ce.com (gayer - kinda local board)
www.turbod16.com (I pop in every now and then)

I think that's about it...