NOS GM Intake Valve – Part #3992275 – 1971–75 Vega, Astre, Monza 2.3L
Description:
🔩 GM Part #3992275 – NOS Intake Valve Overview
GM part number 3992275 is a New Old Stock (NOS) intake valve designed for use in Chevrolet and Pontiac 4-cylinder engines from the early to mid-1970s. Specifically, it fits the 2.3L 140 CID inline-4 engine found in compact GM cars.
📦 Item Details
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Part Number: GM 3992275
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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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Condition: NOS (New Old Stock) in original GM packaging
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Superseded By: GM #5232774 and later #331140
🚗 Vehicle Applications
This valve was used in:
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1971–1975 Chevrolet Vega (140 CID 2.3L I4)
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1975 Pontiac Astre (same engine)
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1975 Chevrolet Monza (2.3L variant)
These vehicles featured GM’s aluminum-head inline-4 engine, and this valve is a direct replacement for the standard-size intake valve in those applications.
