1968-1982 C3 Headlight Housing Rear Link Adjustment Bolt 3918509 - OEM Number(s) (3918509)
Level It Out: 1968–1982 Corvette C3 Headlight Housing Rear Link Adjustment Bolt
Is one of your C3’s headlight doors sitting a little high—or worse, too low? Don’t blame the motor or linkage just yet. The 1968–1982 Corvette Headlight Housing Rear Link Adjustment Bolt is the fine-tuning solution your flip-up headlights need. Specifically engineered to let you raise or lower the headlight door while it's in the down position, this small but mighty bolt helps restore that clean, level line across the front of your classic Corvette.
Why This Part is Essential
Over time, even perfectly functioning headlight assemblies can fall out of visual alignment. That’s where this rear link adjustment bolt comes in. It threads into the headlight housing and allows you to precisely adjust the door height by up to 1/4 inch, helping align the headlight with the fender and hood lines for a flush, factory look.
If your headlight door is sitting uneven, this bolt is not just cosmetic—it's a critical detail that improves the overall fit, finish, and function of your Corvette’s front end.
Product Highlights
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Compatibility: Fits all 1968–1982 Chevrolet Corvette C3 models
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Function: Adjusts the resting height of the headlight door in the closed position
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Adjustment Range: Approximately 1/4 inch up or down
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Material: Hardened steel with OE-style threads for long-lasting durability
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Finish: Zinc-plated for corrosion resistance and clean installation
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OEM Reference: Replaces General Motors Part Number 3918509
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Sold Individually: Two required per car (one per headlight door)
Dimensions and Weight
Installation Insights
Installation is quick and straightforward: simply thread the bolt into the rear link mounting point on the headlight housing. Adjust until the headlight door aligns flush with the surrounding bodywork. A small tweak can make a big visual difference.
Why Corvette Owners Choose This Bolt
Appearance and function go hand-in-hand on any great Corvette, and this adjustment bolt gives you the power to dial in both. It's a direct replacement that makes a visible impact—perfect for restorers, detailers, and weekend perfectionists alike.
Take Action
Don’t let an uneven headlight door throw off your Corvette’s clean lines. Replace your worn or missing Headlight Housing Rear Link Adjustment Bolt (GM 3918509) and get your doors sitting perfectly flush. Sold individually—two required per vehicle. Order now and bring your front end back to factory form.
Also known under these part numbers: (For reference only)