| 1. | An oxygen sensor was added to the exhaust port of the engine.
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| 2. | It has larger, straighter intake and exhaust ports for improved air flow.
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| 3. | Late VG30DE's used slightly smaller oval intake ports, and oval exhaust ports.
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| 4. | These heads have the dog-leg exhaust ports and 50-52 cc combustion chambers.
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| 5. | Intake and exhaust ports were duplicated at both ends of the block.
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| 6. | The 2.4, 2.9 and 4.0 had three exhaust ports, making them preferable.
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| 7. | The cylinder head was a compact design with round intake and exhaust ports.
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| 8. | :: A lot of manufactures find lousy places to put the fan exhaust ports.
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| 9. | The ovens have exhaust ports to remove the moisture-laden air.
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| 10. | The crankshaft was changed, the inlet ports were lowered and the exhaust ports raised.
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