Enginetech SK5091 Rear Main Seal Kit GM 262 305 350 1-Piece Offset Lip with Housing Gasket

The Enginetech SK5091 is a 1-piece rear main crankshaft oil seal kit designed for GM and Chevrolet small block engines including the 262 V6 and the 305/350 V8 families. This kit is a complete solution for stopping or preventing rear main oil leaks during engine rebuilds or targeted seal replacement service.

The SK5091 features an offset lip design that repositions the sealing contact point away from the worn groove on the crankshaft journal, allowing for a reliable oil-tight seal even on cranks with minor wear. The seal is constructed with a Viton elastomer sealing lip, offering excellent resistance to high operating temperatures, oil degradation, and long-term compression set.

Kit Includes:

• 1-piece rear main crankshaft seal with offset lip design
• Rear main seal housing gasket — no need to purchase a full gasket set separately

Key Features:

• Offset lip repositions seal contact away from crankshaft wear groove
• Viton elastomer construction for high-temperature durability
• 1-piece seal design for straightforward installation
• Housing gasket included for a complete, leak-free repair
• Enginetech SK series kit — designed specifically for engine rebuilders
• OE-quality materials or better

Enginetech is a trusted name among professional engine builders and rebuilders. The SK series rear main seal kits bundle the seal and housing gasket together, saving time and eliminating the need to source a full gasket set for this single repair.