Instruction Sheets for Part Number TFS-3261T004-CH1
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Trick Flow® GenX® 255 HD Cylinder Heads for GM LS3 TFS-3261T004-CH1
Part Number: TFS-3261T004-CH1
Trick Flow® GenX® 255 HD Cylinder Heads for GM LS3
Cylinder Head, GenX® 255 HD, CNC Competition Ported, Assembled, 67cc CNC Combustion Chambers, Titanium Retainers, 6-Bolt Pattern, GM LS3, LSX, Each
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Overview
Brand:
Manufacturer's Part Number:
TFS-3261T004-CH1
Part Type:
Product Line:
Summit Racing Part Number:
TFS-3261T004-CH1
UPC:
842645123092
Combustion Chamber Volume (cc):
67
Intake Runner Volume (cc):
255cc
Exhaust Runner Volume (cc):
87cc
Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast aluminum
Camshaft Style:
Hydraulic roller
Intake Port Shape:
Rectangular
Intake Valve Diameter (in.):
2.165 in.
CNC-Machined Combustion Chamber:
Yes
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:
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
Accessory Bolt Holes Drilled:
Yes
Intake Valve Angle:
12
Exhaust Valve Angle:
12
Valve Guides Included:
Yes
Valve Guide Material:
Powdered metal
Valve Seats Machined:
Yes
Valve Seat Machine Style:
3-angle
Valve Seat Material:
Ductile iron
Cylinder Head Color:
Natural
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Heat Crossover:
No
Remanufactured:
No
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.
Trick Flow® GenX® 255 HD Cylinder Heads for GM LS3
Trick Flow® GenX® 255 HD cylinder heads offer an unbeatable combination of performance and durability, making them the perfect upgrade for your high-performance GM LS3 engine build. Assembled with Manley Severe Duty stainless steel valves, these heavy-duty versions of the standard GenX® 255 heads can withstand the added heat, stress, and abuse dealt by big power adders. That makes them the ideal choice for engines using superchargers, turbochargers, or nitrous.
GenX 255 HD cylinder heads have fully CNC-profiled combustion chambers and CNC Competition Ported square port runners with a premium high resolution surface finish that guarantees dimensional accuracy and balanced flow from port-to-port for maximum power potential. The valve angles have been modified from the stock 15° to 12° to increase piston-to-valve clearance and allow the use of larger camshafts. The coolant holes through the head decks were designed to ensure compatibility with all LS head gasket and engine block combinations. The 6-bolt-per-cylinder mounting pattern for GMPP LSX and other aftermarket blocks increases clamping force to prevent head gasket failure, cylinder distortion, and other issues that plague the factory 4-bolt design.
Trick Flow® GenX® 255 HD heads have LS3 port locations to work with all LS3-style intake manifolds and LS9/LSA blower assemblies. They must be used on engines with 4.000" or larger bores.
Cylinder heads are available fully assembled or as bare castings. Sold individually.
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Instructions & Calculators
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