Frankenstein ls3 heads m311. Our strict quality control processes ensure extreme attention to detail and precise tolerances. CNC ported 273cc intake ports for high-boost applications. May 6, 2025 · Whether you're building a turbocharged street monster or prepping for high-RPM abuse, these Boost Monster M311 heads deliver unmatched airflow, strength, and precision—without the added cost of billet stands. Fits factory and aftermarket LS blocks and equipment. 000" and Larger Bore LS Engines when used with a Rectangle Port (LS3) Style Intake Manifold. In Stock, Ready To Ship! The Monster Series M311 273cc LS3 Cylinder Heads are engineered for serious performance enthusiasts seeking unmatched power and reliability. 700” Lift Valve Springs Titanium Retainers O-Ringed Exhaust Ports (Hi-Temp Silicone O-rings Includ Product Description Frankenstein M311 BOOST MONSTER Cylinder Heads - LS3 / LSA / LS9 INCLUDES - TWO (2) FED M311 BOOST MONSTER Cylinder Heads (OPTIONAL: Billet Rocker Stands) Configured for turbos, superchargers and boosted race applications. LS3 cylinder heads with 11degree valve angles are ideal for turbo, supercharger and all boosted racing engine applications. Intake and exhaust chambers are 5-Axis CNC ported with our latest high performance program, meticulously hand blended and deburred. High performance LS3 cylinder heads, for naturally aspirated and boosted applications to 1000hp. Frankenstein introduced another level of horsepower when The Monster was brought to life. FED studied the LS3 and determined opportunities to optimize its inherent characteristics for air speed, flow, and efficiency. 700” Lift Valve Springs Titanium Both the Monster and Boost Monster fit all standard equipment such as valve covers, headers, LS3 Intakes, and OEM-type LS3 rocker arms. FED M311 LS3/LSA Monster Cylinder Heads 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 . Fits GM LS3 valvetrain components for easy integration into your build. The Monster Series is the first threshold into HP creation far beyond any OEM head. Fits all standard equipment. 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 . Fits 4. Few appreciate the complexity of true cylinder head design, particularly the high-power potential from shallow valve angle heads like the M311. Fully CNC Ported, 68cc Chamber Volume 273cc Intake Port, 112cc Exhaust Port and 11° Valve Angle High Quality Components: CHE Bronze Guides Inconel Oct 20, 2021 · Did I make the right choice choosing Frankenstein M311 heads over the Texas Speed PRC 260cc heads? The M311s are currently installed now and just waiting for custom pushrods to arrive. (Billet Rocker Stands Available Separately) Frankenstein Engine Dynamics M311 273cc LS3 Rectangle Cylinder Head-Complete Set Set of two (2) FED Monster-Series M311 (LS3 11°) 273cc rectangle port cylinder heads. FED M311 LS3/LSA Monster Cylinder Heads SOLD AS PAIR! Fully CNC Ported, 72cc Chamber Volume 273cc Intake Port, 112cc Exhaust Port and 11° Valve Angle High Quality Components: CHE Bronze Guides Inconel Exhaust Valves Black Nitride Stainless Steel Severe Duty Intake Valves Custom PAC . Basic build: 416, Kong 2650, Custom Stroker cam and FBO. Note: These are the non boosted version because I Frankenstein Boost Monster M311 LS3 heads with Inconel exhaust valves and CHE bronze guides. When the MONSTER Series™ finally came to life it turned a lot of heads. oqeh anojz oxeqxxd ijdwe kcpsso bgkdy yzo qespq qpai tget