Cometic Gasket · New
Cometic Pontiac 455 Big Block V8 Top End Gasket Kit - 4.300in Bore - .040in MLS Cylinder Head Gasket
MPN PRO1010T-4300-040 · Store SKU cgsPRO1010T-4300-040
Supplier stock checked 11/7/2026, 12:06:33 PM 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 StreetPro Kits cater to the budget-minded street-rodder who is looking to purchase a kit with all necessary gaskets and seals needed for their rebuild. StreetPro gasket kits are sold as a top-end kits and bottom-end kits. Purchase both top- and bottom-end kits for a total engine rebuild. Quality gasket materials are a priority in StreetPro kits. Kit materials include: MLS, AFM, Aramid Fiber, and Armor Clad. MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel Pontiac 455 Big Block V8 Top End Gasket Kit; 4.300in. Bore; .040in. MLS Cylinder Head Gasket Pontiac 455 Big Block V8 Top End Gasket Kit, 4.300" Bore, .040" MLS Cylinder Head Gasket Pontiac 455 Big Block V8 Top End Gasket Kit
Manufacturer fitment & guides
- Pontiac 455 big-block V8 — consult exact manufacturer page for vehicle/year applications
- Application details checked against the exact manufacturer part or product-family guide; confirm all listed restrictions.
Part-specific notes
- California Proposition 65: Y
