Performance cylinder heads for big block Chevrolet engines

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  • Promaxx Shocker 340 BBC CNC Cylinder Head Promaxx Shocker 340 BBC CNC Cylinder Head

    Promaxx Shocker 340 BBC CNC Cylinder Head

    The Shocker CNC 340cc BBC is a professional designed cylinder head using the latest CNC porting tools. These heads out flow the competition at a price that cannot be touched. Some comparable heads are double the cost of one Shocker 340 CNC. Flowing over...

    $1,849.00 - $2,898.00
  • Promaxx MAXX 317 BBC Cylinder head Promaxx MAXX 317 BBC Cylinder head Promaxx MAXX 317 BBC Cylinder head

    Promaxx MAXX 317 BBC Cylinder head

    The Maxx 317 is truly a rare breed in today’s market. An As Cast head that is just as efficient as competition’s CNC ported pieces. Independent flow bench testing shows over 385 cfm with 2.250 Intake valve and over 400 with 2.300 valves. This...

    $1,199.00 - $2,043.00
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