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Aeroflow ALL PRO SBC MLX 4.165" HEAD GASKET .040" THICK ALLPRO COMETIC H3411SP6040S | TrackTheory
AEROFLOW · CMH3411SP6040S Aeroflow · CMH3411SP6040S ALL PRO SBC MLX 4.165" HEAD GASKET .040" THICK ALLPRO COMETIC H3411SP6040S MLS head gasket built to hold boost, heat, and high-compression SBC builds.
▸ Multi-layer steel construction for consistent, repeatable sealing▸ 0.040" compressed thickness suits mildly decked or standard blocks▸ 4.165" bore accommodates stroked and overbored small-block Chevrolet combinations▸ Cometic MLX technology resists combustion blowout under sustained load▸ Reusable across rebuilds when surfaces are properly prepared
Australian-owned. Stocking circuit racing parts, track-day essentials, and performance upgrades.
ALL PRO SBC MLX 4.165" HEAD GASKET .04… $302.50
Add to cart Dispatched in 1-2 business days · 30-day returns
Home Shop Garage Account $303
incl. GST · ships AU-wide
“The bite is sharp from the first stop. Compounds where they should be when the rotors come up to temperature.”
Specifications
On the spec sheet. Spec sheet coming — contact support for full spec details. Fitment
Will this fit? Fitment data still being indexed for this product. Ask BuildBot for a fit-check against your vehicle.
Why this part
Composite gaskets fail where MLS gaskets don't — under repeated heat cycling, high cylinder pressure, and imperfect surface finishes. The Cometic MLX design uses multiple embossed steel layers that conform and recover, maintaining a live seal rather than a compressed one. For any SBC build that sees real load, the price difference over a composite unit is irrelevant after the first failure.
Pairs well with
Other parts in this build. © 2026 TrackTheory · ABN 33 689 462 504 Built in Adelaide · Shipping AU-wide
