SBC Oil Dipstick Tube - Lower inside Block

The SBC Oil Dipstick Tube – Lower Inside Block from Chevrolet Performance (Part No. 3951600) is a genuine OEM replacement dipstick tube assembly designed for small block Chevrolet engines. This steel-constructed tube mounts directly to the engine block and serves as the access point for oil level monitoring, a critical maintenance check on any vehicle powered by SBC architecture.

Measuring 7.5 inches in length with a 1.75-inch outer diameter and 1.25-inch width, this dipstick tube fits within the tight engine bay tolerances of small block platforms. The block-mount configuration eliminates the need for additional fastening hardware, as it integrates directly into the engine's casting. Steel construction provides durability against thermal cycling and vibration common to high-RPM or continuous-duty operation. The tube-only design allows builders and technicians to pair it with dipstick assemblies and extensions appropriate to their specific engine configuration, oil pan design, and under-hood clearance requirements.

This replacement is essential for engine rebuilds, block replacements, or when original dipstick tubes show corrosion, cracks, or detachment from the block. OEM Chevrolet Performance parts ensure precise fitment and reliable operation across generations of small block Chevy platforms, from classic muscle car builds to modern crate engine installations. The 0.07-pound weight reflects the compact steel assembly design.

Small block Chevrolet engines remain the most widely rebuilt and swapped platform in automotive culture, making OEM service components like this dipstick tube critical inventory for engine builders, restoration shops, and enthusiasts performing block work. Choosing genuine Chevrolet Performance parts eliminates guesswork on fitment and thread compatibility.