Can someone tell me what the difference between a PR4-3 head and a PR4-4 head is? THe PR4-3 head is off a 93 Integra RS, and I have a rebiult PR4-4 head im going to put on the block. Will it work or are they different?
it will work just fine.. the second digit i think is when they were cast, so the years may be different, but if you are using the proper dist. etc you'll be fine
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