1956–1957 Early Corvette C1 Gas Tank 16 Gal – Lock Ring and O-Ring 3717798 - OEM Number(s) (3717798)
1956–Early 1957 C1 Corvette Fuel Tank, 16 Gallon – With Baffles
Fits 1957 Serial #1420 and Earlier
This 16-gallon replacement fuel tank is engineered for early 1956 through serial #1420 of 1957 Corvettes. While GM's originals were non-baffled, this updated version includes internal baffles—providing modern drivability without compromising fit. A precise fitment at 42" x 14-7/8" x 9-1/2", it includes the LO40 lock ring and O-ring for your sending unit.
Features
• 16-gallon (60 liter) capacity
• Non-vented, correct for early 1956–1957 applications
• Includes O-ring and LO40 lock ring for sending unit
• Measures 42" x 14-7/8" x 9-1/2"
• Features internal baffles (not present on OE tanks)
• Does not include “O.L. Anderson” top stamp
Because Details Matter
• Fits all 1956 Corvettes
• Fits early 1957 Corvettes, up to Serial #1420
• Improved slosh control with modern baffling
• Direct bolt-in fitment
Under the Straw Hat – Restorer’s Insight
GM didn’t begin using baffles in fuel tanks until May 1960. This updated tank adds that stability without compromising the OE profile—reducing fuel slosh, minimizing odor, and improving drive quality on curves or under load. A quiet upgrade with real-world benefit.
Tech Notes
All fuel tanks are manufactured with a sprayed-on interior rust inhibitor. This lining must be removed before installation to avoid clogging your carburetor or fuel injection system.
Tank Prep Instructions
• Seal all openings with rags and duct tape
• Add a cleaner (e.g., carburetor cleaner, acetone, MEK)
• Insert small hardware (nuts/bolts), then shake vigorously
• Repeat until fluid drains clear
• Remove rags, tape, and hardware
• Let tank dry completely before installation
Also known under these part numbers: (For reference only)
- 361017
- 3717798
- 686420044024
- GM45A