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Aeroflow BBC GEN 5&6 4.320" BORE .043" COMP THICK 454-502. SCE - P143243 | TrackTheory
AEROFLOW · SCE-P143243 Aeroflow · SCE-P143243 BBC GEN 5&6 4.320" BORE .043" COMP THICK 454-502. SCE - P143243 MLS head gasket built for big block Chevy Gen 5 and 6 power.
▸ 4.320-inch bore suits 454 and 502 cubic inch variants▸ 0.043-inch compressed thickness raises compression ratio measurably▸ Multi-layer steel construction handles repeated heat cycling reliably▸ Rated for high cylinder pressures found in track and performance builds▸ Sold individually — two required for a complete engine$127
Australian-owned. Stocking circuit racing parts, track-day essentials, and performance upgrades.
BBC GEN 5&6 4.320" BORE .043" COMP THI… $127.05
Add to cart Dispatched in 1-2 business days · 30-day returns
Home Shop Garage Account 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
Cheap composite gaskets lose their seal under the sustained heat and pressure big block builds generate on track. MLS construction holds clamping load through repeated thermal cycles — no embedding, no blowout. At 0.043 inches compressed, you get a real compression ratio gain without touching the machine shop.
Pairs well with
Other parts in this build. © 2026 TrackTheory · ABN 33 689 462 504 Built in Adelaide · Shipping AU-wide
