| 41. | Five valve designs ( with three inlet and two exhaust valves ) are also in use.
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| 42. | The intake valve was 40 41 mm and exhaust valves were 33 mm or 34 mm.
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| 43. | Intake and exhaust valves are also increased in size along with other changes to the cylinder head.
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| 44. | The exhaust valve linkage required frequent adjustment.
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| 45. | The exhaust valves on NHRA Top Fuel and Funny Car drag racing engines are made of Inconel.
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| 46. | VCT allows the timing of the intake and exhaust valves to be adjusted independently of each other.
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| 47. | For the seventh series exhaust valves with floating seats were introduced and the reduction gearing was improved.
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| 48. | Exhaust valves were sodium-filled to aid cooling.
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| 49. | The engine is an aluminium alloy block and head with sodium filled exhaust valves to avoid overheating.
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| 50. | The exhaust valves also burnt through.
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