Cometic Gasket · New
Cometic Chevy Mark IV Big Block V8 Rear Main Seal 2 Pc Double Split Seal Wet & Dry Sump 86665
MPN C5381 · Store SKU cgsC5381
Supplier stock checked 11/7/2026, 8:34:45 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
COMETIC Front and Rear Main Crank Seals are manufactured from the best materials available and are suited for all types of environments. Each seal meets or exceeds OEM quality. Ok for wet or dry sump systems Chevrolet Mark-IV Big Block V8 Rear Main Seal, 2 Piece, Double Split Seal, Wet & Dry Sump Applications, 86665, T-13676-DS Chevrolet Mark-IV Big Block V8 Rear Main Seal; 2 Piece; Double Split Seal; Wet/Dry Sump Applications; 86665; T-13676-DS Cometic utlizes their in-house dynamometersand engine assembly rooms to ensure quality and reliability Chevrolet Mark-IV Big Block V8 Rear Main Seal
Manufacturer fitment & guides
Check C5381 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
