Trick Flow GenX?? 220 cylinder heads for GM 5.7L LS1 engines are the best value in GM LS performance. These cathedral port heads incorporate features of Trick Flow??s fully CNC-ported LS heads such as 13.5?ø valve angles, decreased valve shrouding, increased 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 rigid casting design 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.
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. Sold individually.
Features
- Cylinder Head Style:
- Assembled
- Cylinder Head Material:
- Cast aluminum
- Cylinder Head Finish:
- Natural
- CNC-Machined Combustion Chamber:
- Yes
- Combustion Chamber Volume (cc):
- 64cc
- Combustion Chamber Style:
- Heart
- CNC-Machined Intake Runner:
- No
- Intake Runner Volume (cc):
- 220cc
- Intake Port Shape:
- Cathedral
- Intake Port Location:
- Standard
- Intake Valve Angle:
- 13.5 degree
- CNC-Machined Exhaust Runner:
- No
- Exhaust Runner Volume (cc):
- 80cc
- Exhaust Port Shape:
- Oval
- Exhaust Port Location:
- Standard
- Exhaust Valve Angle:
- 13.5 degree
- Intake Valves Included:
- Yes
- Intake Valve Diameter (in.):
- 2.040 in.
- Exhaust Valves Included:
- Yes
- Exhaust Valve Diameter (in.):
- 1.570 in.
- Valve Type:
- Stainless
- Maximum Valve Lift (in.):
- 0.600 in.
- Valve Springs Included:
- Yes
- Valve Spring Type:
- Dual
- Outside Diameter of Outer Spring (in.):
- 1.300 in.
- Valve Guides Included:
- Yes
- Valve Guide Material:
- Bronze
- Valve Seats Machined:
- Yes
- Valve Seat Material:
- Ductile iron
- Valve Seat Machine Style:
- 3-angle
- Retainers Included:
- Yes
- Retainer Material:
- Titanium
- Valve Stem Seals Included:
- Yes
- Valve Stem Seal Style:
- Viton Positive Seals
- Locks Included:
- Yes
- Lock Style:
- 7 degree
- Camshaft Style:
- Hydraulic Roller
- Spark Plug Style:
- Angled
- Guideplates Included:
- No
- Rocker Arm Studs Size:
- N/A
- Rocker Arm Studs Included:
- No
- Rocker Arm Nut Thread Size:
- N/A
- Accessory Bolt Holes Drilled:
- Yes
- Valve Cover Mounting Style:
- Centerbolt
- Heat Crossover:
- No
- Steam Holes Drilled:
- No
- Oiling Style:
- Through head
- Machined for O-Ring:
- No
- Quantity:
- Sold individually.
- Notes:
- 14mm Spark Plug, .750 Reach, 5/8 Hex
- Make:
- Chevrolet
- Engine Family:
- Chevy small block Gen III/IV (LS-based engines)
- Engine Sizes:
- 5.7L/350
- Years:
- 1997-2004
