Monster Series Cylinder Heads
The Monster Series cylinder head is the perfect choice & offers superior proven gains for your best bang for buck aftermarket cylinder head upgrade.
Check out the below highlights of the Monster Series cylinder heads:
M311 - (LS3 11°) 273cc rectangle port cylinder heads
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
- Casting outsourced overseas. Engineered, Machined and Assembled by FED in the USA
M311 Standard Inclusions:
- O-Ringed Exhaust Ports
- Intake Valve Seats – Ductile Iron
- Exhaust Valve Seats – Ductile Iron
- FED Custom Prime Grade Stainless Steel Intake Valve – 2.165″
- FED Custom Prime Grade Stainless Steel Exhaust Valve – 1.600″
- FED Billet Rocker Stands For Stock LS3 Rockers
- FED Dual Valve Spring .700 lift – Custom by PAC Racing
- FED Titanium Retainers
- 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
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
Options/Upgrades:
- Intake Valve Guides – Bronze
- Exhaust Valve Guides – Bronze
- Manley Dual Valve Spring – Polished – .660 lift – NexTek Series
- PAC Racing Dual Valve Spring – .700 lift (PAC-1207X)
- PAC Racing Dual Valve Spring – .750 lift (PAC-1209X)
- FED Custom INCONEL Exhaust Valve – 1.600″
- FED Custom CRN Coated Titanium Intake Valve – 2.165″
- Need more customisation? Don’t see the option you are looking for? Get in touch
The Numbers:
