Serious horsepower for your LS1-based engine, heads sold individually.
Transform your LS1 into a powerhouse! Trick Flow® GenX® 220 cylinder heads for GM 5.7L LS1 engines are a great value in performance. The cathedral port heads incorporate features of Trick Flow® fully CNC-ported LS heads in a more affordable "Fast As Cast®" version that flows nearly as much air as their 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 degree 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.
Manufacturer's Part Number: TFS-30610001
Part Type: Cylinder Heads
Product Line: Trick Flow GenX® 220 Cylinder Heads for GM LS1
Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Intake Port Shape: Cathedral
Intake Valve Diameter (in): 2.040 in.
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 Location: Standard
Exhaust Port Shape: Oval
Exhaust Port Location: Standard
Spark Plug Style: Angle
Intake Valves Included: Yes
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in): 1.570 in.
Valve Springs Included: Yes
Maximum Valve Lift (in): 0.650 in.
Outside Diameter of Outer Spring (in): 1.300 in.
Damper Spring Included: No
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Chromoly steel
Locks Included: Yes
Lock Style: 7 degree
Valve Stem Seals Included: Yes
Rocker Arm Studs Included: No
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates 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
Heat Crossover: No
Quantity: Sold individually.
Notes: Combustion chamber features a CNC bowl blend. Must be used with roller rocker arms. Recommended for use on engines with a minimum bore diameter of 3.900 in.
CARB EO Number: D-747
Emissions: California EO Approved
