Stant SO-66 Oil Filler Cap 1949-1954 Chevy 1965-1970 Corvette Camaro NOS

Genuine Stant SO-66 Oil Filler Cap (New Old Stock)

Restore your classic GM vehicle with this genuine Stant SO-66 (SO66) oil filler cap. This is a vintage-style Closed System cap designed for the standard 1-1/8" I.D. cammed (twist-lock) hole found on classic Chevrolet valve covers.

Manufactured in the USA, this cap is a direct replacement for GM Part # 3835665. It is highly sought after for restoration on everything from early "Stovebolt" 6-cylinders to high-performance Big Block V8s.

Key Features:

• Part Number: Stant SO-66 (Interchanges with Stant 10066, GM 3835665, AC Delco FC-60)

• Fitment Size: Fits 1-1/8" I.D. Cammed/Twist-Lock Hole

• Finish: Zinc Plated / Silver

• Condition: New Old Stock (NOS) - Made in USA

Verified Vehicle Fitment:

• Chevrolet Cars:

  • 1949-1954 All Models (6-Cyl "Stovebolt")

  • 1955-1957 Bel Air / 210 / 150 (V8)

  • 1964-1969 Chevelle, Nova, Camaro (V8 Models with Twist-Lock Tube)

• Chevrolet Corvette:

  • 1953-1955 (6-Cyl)

  • 1965-1967 (396/427 Big Block)

  • 1969-1970 (350 V8)

• Chevrolet Trucks:

  • 1955-1958 (6-Cyl Series 10-60)

  • 1967-1972 C/K Series (V8)

• Other GM:

  • Fits various Pontiac, Oldsmobile, and Buick models from the 1950s-70s utilizing the standard GM twist-lock oil tube.

Note: Please verify your valve cover has the "Twist-Lock" style hole (not a rubber push-in) before ordering.