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Frankenstein Monester LS3 Cylinder Heads (SET)

Frankenstein Monester LS3 Cylinder Heads (SET)

Regular price $3,129.96 USD
Regular price Sale price $3,129.96 USD
Sale Sold out
Shipping calculated at checkout.

The first step into the bedlam of Frankenstein power.

  • Fully CNC ported, 72cc chamber volume
  • 273cc intake port, 112cc exhaust port and 11° valve angle
  • High Quality Components:
    • Black Nitride Stainless Steel Severe Duty Valves
    • Custom PAC .700” Lift Valve Springs
    • Titanium Retainers
  • O-Ringed Exhaust Ports (Hi-Temp Silicone O-rings Included)
  • 2″ Headers Recommended
  • Sold Per Set

Price Includes a pair of Billet Rocker Stands


The Monster Series is the first threshold into HP creation far beyond any OEM head.

Frankenstein introduced another level of horsepower when The Monster was brought to life. FED poured our arsenal of precision engineering into a common cylinder head and woke the industry. Intake and exhaust chambers are 5-Axis CNC ported with our latest high performance program, meticulously hand blended and deburred. Our strict quality control processes ensure extreme attention to detail and precise tolerances. High quality components include FED’s premier stainless steel severe duty valves, custom PAC .700” lift valve springs, titanium retainers, bronze guides and hi-temp silicone exhaust o-ring gaskets.

Monster’s crazy cousin “Boost Monster” is now available for power adders. The Boost Monster features CHE mag-bronze valve guides and Inconel exhaust valves for the increased heat. Both the Monster and Boost Monster fit all standard equipment such as valve covers, headers, LS3 Intakes, and OEM-type LS3 rocker arms. (Billet Rocker Stands Available Separately)

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Guaranteed Quality

St. Paul Speed & Performance hand selects the brands we offer based on decades of experience in domestic automotive performance and modification. If you ever experience a problem with your order, our representatives are well equipped to help ensure your purchase brings satisfaction.

  • Best Available Price

    St. Paul Speed & Performance's distribution partners work to provide us with the best possible price for the products we sell. We pass that on to you, the customer. If you find a product you are interested in at a lower price elsewhere, please let us know and we will match that price if we can.

  • Returns

    We accept unopened items free of charge, excluding shipping fees.
    Unfortunately, during this time, we can not process opened items that
    would typically have a restocking fee.