These are not a direct fit.
All Hytech exhausts are made for H2B conversions for Civics so they not angled enough since H22s sit upright in Civic engine bays and not reclined in Prelude.
Therefor these replicas also dont fit.
I have seen some fit with minor issues like clearing the subframe is an issue but my genuine hytech was angled to low and had to be cut and rewelded.
Best headers you can buy bar a pricey genuine one.
Pretty easy to fit for an exhaust place, Vanzep has my old one and its one of the best bits I ever bought for the H22. Put it this way I'd buy another without thinking about it as I rate them that highly.