Performance Parts and Accys.

Engine performance parts and accessories. Cylinder heads, camshafts, carburetors, fuel injection kits and more.

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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
  • Promaxx Maxx 183 SBC  Cylinder Heads Promaxx Maxx 183 SBC  Cylinder Heads Promaxx Maxx 183 SBC  Cylinder Heads

    Promaxx Maxx 183 SBC Cylinder Heads

    Ultra-smooth 356-T6 casting 5 angle valve job Diamond honed guides Hand bowl blending Chamber unshrouded Flows over 250cfm Precision CNC machining Professional assembly Available with multiple spring options; Hyd Flat, Hyd Roller Solid and...

    $719.00 - $1,171.00
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