Manufacturer's Part Number: TFS-30510001-C00 Part Type: Cylinder Heads Product Line: Trick Flow® GenX® 205 Cylinder Heads for GM LS 4.8L/5.3L/5.7L (Vortec) Cylinder Head Style: Assembled Cylinder Head Material: Aluminum Intake Valve Diameter (in): 2.000 in. 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 Shape: Oval Exhaust Port Location: Standard Spark Plug Style: Angle Intake Valves Included: Yes 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 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: Powdered metal Valve Seats Machined: Yes Valve Seat Machine Style: 3-angle Valve Seat Material: Ductile iron Steam Holes Drilled: No Oiling Style: Through pushrod Machined for O-Ring: No Heat Crossover: No Quantity: Sold individually. CARB EO Number: D-747 (pdf) To see a list of qualifying vehicles, enter CARB EO Number D-747 Emissions: California EO Approved
