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FLOTEK 276cc LS3 Cylinder Heads LS3-505 Head, Assembled, 68cc Combustion Chamber, Intake Runner, 92cc Exhaust Runner, Aluminum, Chevy, LS, Each

SKU: FLKLS3-505

Cylinder Heads

FLOTEK 276cc LS3 Cylinder Heads LS3-505 Head, Assembled, 68cc Combustion Chamber, Intake Runner, 92cc Exhaust Runner, Aluminum, Chevy, LS, Each

SKU: FLKLS3-505

Cylinder Heads
A$2,158.43
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

FLOTEK 276cc LS3 cylinder heads feature as-cast high-flow intake runners that flow significantly better than the stock LS3 heads. The ports are in the stock location, so no special valvetrain parts or rocker arms are required. These heads are 15 degree, which is the same as the stock cylinder heads—no special pistons are required. They will work on any LS block that has a 4 in. bore or larger. FLOTEK 276cc LS3 cylinder heads combine high performance and high quality at a value price. Select from bare or assembled models.

Additional Information

w/Hyd. Roller Springs

Part Type

LS3 276cc Cyl Head Assembled

Data: v4.2 - Upd: 2026-09-29 00:35:43

Specifications

Product Attributes - Brand
Flotek
Product Attributes - Manufacturer's Part Number
LS3-505
Product Attributes - Part Type
Cylinder Heads
Product Attributes - Product Line
FLOTEK 276cc LS3 Cylinder Heads
Product Attributes - UPC
00850134007914
Product Attributes - Combustion Chamber Volume (cc)
68
Product Attributes - Intake Runner Volume (cc)
276cc
Product Attributes - Exhaust Runner Volume (cc)
92cc
Product Attributes - Cylinder Head Style
Assembled
Product Attributes - Cylinder Head Material
Cast aluminum
Product Attributes - Camshaft Style
Hydraulic roller
Product Attributes - Intake Port Shape
Rectangular
Product Attributes - Intake Valve Diameter (in.)
2.160 in.
Product Attributes - CNC-Machined Combustion Chamber
No
Product Attributes - CNC-Machined Intake Runner
No
Product Attributes - CNC-Machined Exhaust Runner
No
Product Attributes - Combustion Chamber Style
Kidney
Product Attributes - Intake Port Location
Standard
Product Attributes - Exhaust Port Shape
Rectangular
Product Attributes - Exhaust Port Location
Standard
Product Attributes - Spark Plug Style
Angle
Product Attributes - Intake Valves Included
Yes
Product Attributes - Exhaust Valves Included
Yes
Product Attributes - Exhaust Valve Diameter (in.)
1.590 in.
Product Attributes - Valve Springs Included
Yes
Product Attributes - Maximum Valve Lift (in.)
0.625 in.
Product Attributes - Outside Diameter of Outer Spring (in.)
1.290 in.
Product Attributes - Damper Spring Included
Yes
Product Attributes - Number of Springs Per Valve
Dual
Product Attributes - Retainers Included
Yes
Product Attributes - Retainer Material
Chromoly steel
Product Attributes - Locks Included
Yes
Product Attributes - Lock Style
7 degree
Product Attributes - Valve Stem Seals Included
Yes
Product Attributes - Valve Stem Seal Style
Positive stop
Product Attributes - Rocker Arm Studs Included
No
Product Attributes - Rocker Arms Included
No
Product Attributes - Rocker Arm Nuts Included
No
Product Attributes - Guideplates Included
No
Product Attributes - Valve Cover Mounting Style
Centerbolt
Product Attributes - Accessory Bolt Holes Drilled
Yes
Product Attributes - Intake Valve Angle
15
Product Attributes - Exhaust Valve Angle
15
Product Attributes - Valve Guides Included
Yes
Product Attributes - Valve Guide Material
Bronze
Product Attributes - Valve Seats Machined
Yes
Product Attributes - Valve Seat Material
Powdered metal
Product Attributes - Cylinder Head Color
Natural
Product Attributes - Steam Holes Drilled
No
Product Attributes - Oiling Style
Through pushrod
Product Attributes - Machined for O-Ring
No
Product Attributes - Heat Crossover
No
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Fits 4.00 in. bore diameter or larger only.

Reference Information

Brand Name/s Flotek
StreetFX SKU flkLS3-505
SFX Item ID 5202594
Supplier Item Code 5202594
Manufacturer SKU LS3-505
Manufacturer UPC 850134007914
Alternative References FTCLS3-505, 276cc, LS3, 68cc, 92cc

Compatibility

Application Data
  • Application NotesFits 4.00 in. bore diameter or larger only.
    Beginning Year1999
    Cylinder Head TypeLS3
    Ending Year2019
    Engine FamilyCHEVY SMALL BLOCK GEN III/IV LS V8 GAS
    Engine Size6.0L/364
    Engine TypeV8
    MakeCHEVROLET
    Rocker Arm Mounting Style (application)Pedestal
  • Application NotesFits 4.00 in. bore diameter or larger only.
    Beginning Year2006
    Cylinder Head TypeLS3
    Ending Year2015
    Engine FamilyCHEVY SMALL BLOCK GEN III/IV LS V8 GAS
    Engine Size7.0L/427
    Engine TypeV8
    MakeCHEVROLET
    Rocker Arm Mounting Style (application)Pedestal
  • Application NotesFits 4.00 in. bore diameter or larger only.
    Beginning Year2008
    Cylinder Head TypeLS3
    Ending Year2017
    Engine FamilyCHEVY SMALL BLOCK GEN III/IV LS V8 GAS
    Engine Size6.2L/376
    Engine TypeV8
    MakeCHEVROLET
    Rocker Arm Mounting Style (application)Pedestal

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