Not necessary. It gets great airflow as it is, and has short lines, so it is simple.
FYI- the oil cooler from my Cosmo is considered an upgrade for any rotary, since they are like 8 core!!
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1976 Mazda Cosmo RX-5
1976 Mazda Cosmo RX-5
2003 Toyota Tundra TRD
2015 Toyota 4Runner SR5
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