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Trickflow GenX® Cylinder Heads, GM LS 4.8L/5.3L/5.7L (Vortec), 205cc Intake, Chromoly Retainers .650 max lift

SKU: TFS-30510001-C00

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. Springs are good to .650 lift.

Trick Flow GenX 205 cylinder heads are emissions-legal under CARB E.O. #D-747 for 1997-present GM vehicles with 4.8L, 5.3L, 5.7L, and 6.0L engines. They are available fully assembled or as bare castings. Sold individually.

Was: $1,374.99

Sale: $1,174.99

Save: 15%

Save: $200.00

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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