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  • FrankenstenM311 286cc Boost Monster PLUS
  • FrankenstenM311 286cc Boost Monster PLUS
  • FrankenstenM311 286cc Boost Monster PLUS
  • FrankenstenM311 286cc Boost Monster PLUS
FrankenstenM311 286cc Boost Monster PLUS FrankenstenM311 286cc Boost Monster PLUS FrankenstenM311 286cc Boost Monster PLUS
FrankenstenM311 286cc Boost Monster PLUS

Snap Logo Lease for as low as $/week Learn More


Type: heads
Vendor: frankenstein

Description:

FED M311 LS3/LSA Monster PLUS  Cylinder Heads
 SOLD AS PAIR! 


286 cc intakes for big angry LS3 monsters only.

  • Built for “plus sized” units with higher compression applications (13:1+).
  • Higher rpm (7500+) and/or higher cubic inch builds (427ci+).
  • Higher boost levels (30psi+).
  • Premier stainless severe duty intake valves, Inconel exhaust valves and CHE bronze guides.
  • Fits all standard equipment: valve covers, headers, LS3 intakes, OEM-type LS3 rocker arms.
  • Sold Per Set and assembled

Castings:

  • 6 Bolt Head
  • 0.750″ Deck Structure
  • OEM/Factory Style Water Crossover Ports
  • 7/16″ Stud Size For Main 10 Bolts
  • 8mm Stud Size For Outer Tabs and Deck Studs

Their Process:

  • 5-Axis CNC Ported Intake Ports, Exhaust Ports, and Combustion Chambers
  • Precision 5-Angle CNC Valve Job
  • PCD Deck Milled
  • Hand Blended and Deburred
  • Final Wash
  • Final Assembly with Spring Heights Checked
  • Quality Control at every stage of manufacturing
  • Engineered and Machined by FED in the USA.

Options/Components:

  • FED Billet Rocker Stands For Stock LS3 Rockers
  • Severe Duty Intake valves
  • Inconel Exhaust Valves
  • Intake Valve Guides – Bronze
  • Exhaust Valve Guides – Bronze
  • Manley Polished Nextek HP Dual Spring 1.295″ 155# @ 1.800/405# @1.150/.660 lift (Hydraulic)
  • FED Titanium Retainers
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  • FED Steel Valve Spring Locators – .565 Guide
  • Stock Style 7° Valve Locks
  • US Seal Viton High Heat Valve Stem Seals
  • US Seal Hardened Spring Shims

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