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i have an '83, not sure if theyre the same but probably are

6x9 for the rears

3 1/2" for the dash

6 or 6 1/2 for door

youll have to measure for urself to be 100% sure, just take the speaker out and measure straight across, speaker sizes go by 1/2" so if it measures something like 3 3/4" it would be a 3 1/2

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14y ago
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Q: What are the speaker size on an 1991 Oldsmobile Ninety-eight?
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