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FLOTEK 320cc Big Block Chevy Cylinder Heads 305-6058 Head, 320cc, Solid Roller, Aluminum, Assembled, 0.750 in. Lift, Chevrolet, Mark IV, Each

SKU: FLK305-6058

Cylinder Heads

FLOTEK 320cc Big Block Chevy Cylinder Heads 305-6058 Head, 320cc, Solid Roller, Aluminum, Assembled, 0.750 in. Lift, Chevrolet, Mark IV, Each

SKU: FLK305-6058

Cylinder Heads
A$2,471.31
LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

FLOTEK 320cc big block Chevy cylinder heads are a powerful addition to your build right out of the box! They feature a thick deck design and high-capacity water jackets, making them a reliable option for street or strip applications. The heads can be used with stock pistons and feature raised valve cover rails (exhaust port location is raised 0.500 in.). FLOTEK 320cc BBC cylinder heads are a great choice for adding horsepower! Models are available assembled or bare for a variety of engine applications.

NOTE: This item is not sold as a pair; this is a single cylinder head.

Part Type

BBC 320cc Alum Cyl Head Assembled

Data: v4.2 - Upd: 2026-09-29 00:35:44

Specifications

Product Attributes - Brand
Flotek
Product Attributes - Manufacturer's Part Number
305-6058
Product Attributes - Part Type
Cylinder Heads
Product Attributes - Product Line
FLOTEK 320cc Big Block Chevy Cylinder Heads
Product Attributes - UPC
850134007693
Product Attributes - Combustion Chamber Volume (cc)
133
Product Attributes - Intake Runner Volume (cc)
320cc
Product Attributes - Exhaust Runner Volume (cc)
128cc
Product Attributes - Cylinder Head Style
Assembled
Product Attributes - Cylinder Head Material
Cast aluminum
Product Attributes - Camshaft Style
Solid roller
Product Attributes - Intake Port Shape
Rectangular
Product Attributes - Intake Valve Diameter (in.)
2.250 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
Heart
Product Attributes - Intake Port Location
Standard
Product Attributes - Exhaust Port Shape
Oval
Product Attributes - Exhaust Port Location
Raised
Product Attributes - Spark Plug Style
Angle
Product Attributes - Intake Valves Included
Yes
Product Attributes - Exhaust Valves Included
Yes
Product Attributes - Exhaust Valve Diameter (in.)
1.880 in.
Product Attributes - Valve Springs Included
Yes
Product Attributes - Maximum Valve Lift (in.)
0.750 in.
Product Attributes - Outside Diameter of Outer Spring (in.)
1.620 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
Yes
Product Attributes - Rocker Arm Nut Thread Size
7/16 in.-20
Product Attributes - Rocker Arms Included
No
Product Attributes - Rocker Arm Nuts Included
No
Product Attributes - Guideplates Included
Yes
Product Attributes - Guideplate Pushrod Size
3/8 in.
Product Attributes - Valve Cover Mounting Style
Perimeter bolt
Product Attributes - Accessory Bolt Holes Drilled
Yes
Product Attributes - Intake Valve Angle
24/4
Product Attributes - Exhaust Valve Angle
15/4
Product Attributes - Valve Guides Included
Yes
Product Attributes - Valve Guide Material
Manganese bronze
Product Attributes - Valve Seats Machined
Yes
Product Attributes - Valve Seat Machine Style
3-angle
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.

Reference Information

Brand Name/s Flotek
StreetFX SKU flk305-6058
SFX Item ID 5202643
Supplier Item Code 5202643
Manufacturer SKU 305-6058
Manufacturer UPC 850134007693
Alternative References FTC305-6058, 320cc

Compatibility

Application Data
  • Beginning Year1965
    Ending Year1970
    Engine FamilyChevy big block Mark IV
    Engine Size6.5L/396
    Engine TypeV8
    MakeCHEVROLET
    Rocker Arm Mounting Style (application)Stud
    Valves Per Engine16
  • Beginning Year1966
    Ending Year1969
    Engine FamilyChevy big block Mark IV
    Engine Size7.0L/427
    Engine TypeV8
    MakeCHEVROLET
    Rocker Arm Mounting Style (application)Stud
    Valves Per Engine16
  • Beginning Year1970
    Ending Year1972
    Engine FamilyChevy big block Mark IV
    Engine Size6.6L/402
    Engine TypeV8
    MakeCHEVROLET
    Rocker Arm Mounting Style (application)Stud
    Valves Per Engine16
  • Beginning Year1970
    Ending Year1990
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    Engine TypeV8
    MakeCHEVROLET
    Rocker Arm Mounting Style (application)Stud
    Valves Per Engine16

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