LS7 285 | Assembled Pair of Cylinder Heads

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  • Regular price $ 3,900.00
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Mast Motorsports LS7 285 Black Label heads are designed for boosted 4.125"+ bore engines. If you are looking to make more power with your LS7, LSX or other 4.125" engine, the Black Label LS7 285 head is a great choice.

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    • Utilizes the Gen IV LS7 OEM rockers and accepts LS7 intake manifolds
    • Designed for any new Gen IV short-block with 4.125" bore or larger
    • The 6-bolt design is compatible with GM LSX and RHS Blocks
    • Uses a 2.200" intake valve and 1.600" exhaust valve
    • Has a 285cc intake port
    • Has a deck thickness of .750"
    • 70cc Combustion Chamber Standard

    ***Due to the thicker deck and higher valve cover rails some beauty covers are not compatible. When using Corvette (Y-Body) front accessories alternator may need to be clearanced.

    Flow Data w/4.125" Bore Plate
    Lift Intake Exhaust
    0.100 76 65
    0.200 163 118
    0.300 245 171
    0.400 307 212
    0.500 350 229
    0.600 379 245
    0.650 388 247
    0.700 395 249


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