Trickflow Genx® Cylinder Heads, GM Ls1, 220cc Intake, Titanium Retainers, Max Lift .650

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. Trick Flow GenX 220 cylinder heads are emissions-legal under CARB E.O. D-747 for 1997-present GM vehicles with 5.7L and 6.0L engines. They are available fully assembled or as bare castings and sold individually.
Manufacturer's Part Number: TFS-3061T001 Part Type: Cylinder Heads Product Line: Trick Flow® GenX® 220 Cylinder Heads for GM LS1 Cylinder Head Style: Assembled Cylinder Head Material: Aluminum 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 Shape: Cathedral 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: Titanium 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. CARB EO Number: D-747 (pdf) -To see a list of qualifying vehicles, enter CARB EO Number D-747 Emissions: California EO Approved

Install Instructions