NOS GM Intake Valve – Part #6263754 – 1965–74 Corvette, Camaro, Chevelle 454 Big Block
Description:
🔩 GM Part #6263754 – NOS Intake Valve Overview
GM part number 6263754 is a New Old Stock (NOS) intake valve designed for 7.4L (454 CID) big-block V8 engines used in high-performance GM vehicles from 1965 to 1974. These valves were factory-installed in legendary muscle cars and performance platforms, including the Corvette, Camaro, Chevelle, and full-size Chevy models.
📦 Item Details
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Part Number: GM 6263754
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Group Number: GR. 0.296
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Type: Intake Valve
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Material: Hardened steel alloy
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Diameter: 2.07 inches (outside)
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Identification: Blue dot marking (non-swirl polished)
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Condition: NOS in original GM packaging
🚗 Vehicle Applications
This valve fits a wide range of GM big-block V8s, including:
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1965–1974 Chevrolet Corvette (396, 427, 454 CID)
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1966–1972 Chevrolet Chevelle SS
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1967–1972 Chevrolet Camaro SS / ZL1 / COPO
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1965–1974 Chevrolet Impala, Caprice, Biscayne
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Chevy and GMC trucks with big-block 454 engines
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Pontiac and Oldsmobile performance variants using GM big-block heads
These valves were used in high-performance cylinder heads, often found in L78, LS5, LS6, and other big-block configurations.
