Fel-Pro BS40422 is a 2-piece rubber rear main seal gasket set for stock rebuilds and street-driven 1980s GM and Jeep applications. It addresses oil leakage at the rear of the crankshaft with an OEM-style replacement design made for the repair environment, including imperfect sealing surfaces that can be found during engine service.

Fel-Pro BS40422 Features:

• 2-piece rear main seal design is application-specific for the listed engine families, helping technicians restore the crankshaft seal without changing the basic OE-style layout.
• Rubber sealing material provides the flexibility needed for a dependable seal at the rear main cap and crankshaft area.
• 5.5 mm thickness is documented for this gasket material, giving rebuilders a concrete spec to compare during service planning.
• Meets or exceeds OE specifications and is validated for fit, form, and function for professional repair and DIY engine work.
• Intended for stock rebuilds and street-driven cars and trucks, not for race applications.

Includes:

• 2-piece rubber rear main seal

Best suited to routine engine resealing, stock rebuilds, and service work where an OEM-style rear crankshaft seal is preferred over a racing-specific seal.

Common fitment covers select Buick Century, Skyhawk, and Skylark; Cadillac Cimarron; Chevy Camaro, Cavalier, Celebrity, Citation, S10, and S10 Blazer; GMC S15 and S15 Jimmy; Oldsmobile Cutlass Ciera, Firenza, and Omega; Pontiac 6000, Firebird, J2000, J2000 Sunbird, and Phoenix; plus 1984 Jeep Cherokee and Wagoneer applications. Engines shown in the source data include 1.8L L4, 2.0L L4, and 2.8L V6, with some applications requiring vehicle and engine verification before ordering.