Cylinder Head Style:Assembled
Cylinder Head Material:Aluminum
Cylinder Head Finish:Natural
Combustion Chamber Volume (cc):64
CNC-Machined Combustion Chamber:Yes
Intake Runner Volume (cc):220cc
Exhaust Runner Volume (cc):80cc
CNC-Machined Intake Runner:No
CNC-Machined Exhaust Runner:No
Combustion Chamber Style:Heart
Intake Port Shape:Cathedral
Intake Port Location:Standard
Exhaust Port Shape:Oval
Exhaust Port Location:Standard
Spark Plug Style:Angle
Intake Valves Included:Yes
Intake Valve Diameter (in):2.040 in.
Exhaust Valves Included:Yes
Exhaust Valve Diameter (in):1.570 in.
Valve Springs Included:Yes
Maximum Valve Lift (in):0.600 in.
Outside Diameter of Outer Spring (in):1.300 in.
Damper Spring Included:No
Number of Springs Per Valve:Dual
Lock Style:7 degree
Valve Stem Seals Included:Yes
Rocker Arm Studs Included:No
Rocker Arms Included:No
Rocker Arm Nuts Included:No
Valve Cover Mounting Style:Centerbolt
Accessory Bolt Holes Drilled:Yes
Intake Valve Angle:13.50
Exhaust Valve Angle:13.50
Valve Guides Included:Yes
Valve Guide Material:Bronze
Valve Seats Machined:Yes
Valve Seat Machine Style:3-angle
Valve Seat Material:Ductile iron
Steam Holes Drilled:No
Machined for O-Ring:No
Notes:Combustion chamber features a CNC bowl blend. Must be used with roller rocker arms.
Trick Flow GenX® 220 cylinder heads for GM 5.7L LS1 engines are a great value in GM LS performance. The cathedral port heads incorporate features of Trick Flow’s fully CNC-ported LS heads in a more affordable “Fast As Cast®” version that flows nearly as much air as Trick Flow’s competition ported heads. The special Fast As Cast runner design duplicates the port shape and profile of fully CNC-ported runners, resulting in near-CNC-ported performance for the same price as regular cast cylinder heads.
Other features include shallower 13.5° valve angles to decrease valve shrouding and increase mid-lift airflow, relocated spark plugs, CNC-profiled combustion chambers with port-to-valve seat blending (bowl blending), improved rocker arm/valve cover clearance, and a rigid casting design. The Trick Flow GenX 220 LS1 cylinder heads are available fully assembled or as bare castings.