FrankenstenM311 286cc Boost Monster PLUS

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
• ¼ x ½ Dowel Pin – Rocker Stand Dowel Pins
• Exhaust Port Silicone O–Rings
• Intake Valve Seats – Ductile Iron
• Exhaust Valve Seats – Ductile Iron
• 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