Description
Cylinder Head Style:Assembled
Cylinder Head Material:Aluminum
Cylinder Head Finish:Natural
Combustion Chamber Volume (cc):58
CNC-Machined Combustion Chamber:Yes
Intake Runner Volume (cc):205cc
Exhaust Runner Volume (cc):80cc
CNC-Machined Intake Runner:Yes
CNC-Machined Exhaust Runner:Yes
Combustion Chamber Style:Heart
Intake Port Shape:Cathedral
Intake Port Location:Standard
Exhaust Port Location:Standard
Intake Valves Included:Yes
Intake Valve Diameter (in):2.000 in.
Exhaust Valves Included:Yes
Exhaust Valve Diameter (in):1.575 in.
Valve Springs Included:Yes
Outside Diameter of Outer Spring (in):1.300 in.
Damper Spring Included:No
Number of Springs Per Valve:Dual
Retainer Material:Titanium
Valve Stem Seals Included:Yes
Rocker Arm Studs Included:No
Rocker Arm Nuts Included:No
Valve Cover Mounting Style:Centerbolt
Accessory Bolt Holes Drilled:Yes
Exhaust Valve Angle:13.50
Valve Guides Included:Yes
Valve Guide Material:Powdered metal
Valve Seat Machine Style:3-angle
Valve Seat Material:Ductile iron
Oiling Style:Through pushrod
Quantity:Sold individually.
These Trick Flow GenX® 205 cathedral port cylinder heads are fully CNC-machined to significantly increase the performance GM’s 4.8L/5.3L/5.7L LS engines. Trick Flow engineers altered the valve angles from 15° to 13.5° to decrease valve shrouding, increase mid-lift airflow, and improve rocker arm-to-valve cover clearance. Top-of-the-line CNC Competition Ported runners have a premium high resolution surface finish for maximum flow and performance. The spark plugs were relocated in the CNC-profiled combustion chambers to enhance mid-lift airflow and increase the rigidity of the casting for extreme horsepower applications. Material was added at the rocker arm mounting points to increase high-rpm valvetrain stability. The Trick Flow GenX 205 cylinder heads are available fully assembled or as bare castings.
