Definitely interchangeable. In fact, www.hondaautomotiveparts.com shows them as having the same part number. I think even the throttle bodies are the same.
awsome thanks, thats what i'm looking for, h23 im's seem to be alot more available and cheaper at that so i may just do that instead of the h22 im for my h22 head
someone on honda-tech said he doesnt think the bolt patterns are the same and that the h22 has the secondary runners which h23 doesnt have.....anyone else?
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