Trick Flow GenX 255 Cylinder Heads (Sold Individually)

Name: Trick Flow GenX 255 Cylinder Heads (Sold Individually)
SKU: Trick Flow
Availability: InStock

$1,515.99 – $1,542.99

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Trick Flow engineers combined the best features of factory GM LS3 and LS7 cylinder heads with Trick Flow’s own unique brand of race-winning engineering and technology to create the ultimate square port LS cylinder head for 4.000″ and larger bore engines—the GenX® 255. The heads feature fully CNC Competition Ported runners with a premium high resolution surface finish for maximum airflow and performance potential. The valve angles have been changed from 15° to 12° to increase piston-to-valve clearance and allow the use of larger camshafts. The coolant holes through the head deck were redesigned to work with all LS head gasket and engine block combinations. Stock LS3 ports accommodate LS3-style intake manifolds and LS9/LSA blower assemblies. GenX 255 heads are available with standard and 6-bolt per cylinder mounting patterns.

Trick Flow GenX 255 cylinder heads are emissions-legal under CARB E.O. #D-747 for 2007-present GM vehicles with 6.2L engines. They are available fully assembled or as bare castings. Sold individually.

Lb Springs

Clear

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ABOUT THIS ITEM
Additional information

Part Number:

TFS-3261T002-C01

Part Type:

Cylinder Heads

Product Line:

Trick Flow® GenX® 255 Cylinder Heads for GM LS3

UPC:

842645109010

Cylinder Head Style:

Assembled

Cylinder Head Material:

Aluminum

Intake Port Shape:

Rectangular

Intake Valve Diameter (in):

2.165 in.

Cylinder Head Finish:

Natural

Combustion Chamber Volume (cc):

CNC-Machined Combustion Chamber:

Yes

Intake Runner Volume (cc):

255cc

Exhaust Runner Volume (cc):

87cc

CNC-Machined Intake Runner:

Yes

CNC-Machined Exhaust Runner:

Yes

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):

1.600 in.

Valve Springs Included:

Yes

Maximum Valve Lift (in):

0.650 in.

Outside Diameter of Outer Spring (in):

1.300 in.

Damper Spring Included:

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:

Rocker Arms Included:

Rocker Arm Nuts Included:

Guideplates Included:

Accessory Bolt Holes Drilled:

Yes

Intake Valve Angle:

Exhaust Valve Angle:

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:

Oiling Style:

Through pushrod

Machined for O-Ring:

Heat Crossover:

Quantity:

Sold individually.

Notes:

These cylinder heads can only be used with a minimum bore diameter of 4.000 in. Includes new rocker arm rail mounts for use with LS3 1.7 ratio rocker arms. OEM rocker arm rail mounts will not work with these heads.

CARB EO Number:

D-747-1 (pdf)
To see a list of qualifying vehicles, enter CARB EO Number D-747-1

Emissions:

California EO Approved