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Howards Cams Hydraulic Flat Tappet Camshafts 122521-15 Camshaft, Tappet, Advertised Duration 275/289, Lift .504/.504, Chevy, Big Block, Each

SKU: HRS122521-15

Camshafts

Howards Cams Hydraulic Flat Tappet Camshafts 122521-15 Camshaft, Tappet, Advertised Duration 275/289, Lift .504/.504, Chevy, Big Block, Each

SKU: HRS122521-15

Camshafts
A$670.45
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

Howards Cams offers their hydraulic flat tappet camshafts in a variety of configurations and performance levels for street, strip, and oval track purposes. All their flat tappet cams meet strict requirements to ensure the highest quality (and many get packaged and shipped in their unique, reusable, high-impact-plastic cases to ensure the quality reaches your doorstep.) Get the profile you want—from mild and smooth to loud and rough—with the hydraulic flat tappet camshafts from Howards Cams designed for your application.

Part Type

Hydraulic Cam - BBC Max Marine

Data: v4.2 - Upd: 2026-09-29 03:36:27

Specifications

Product Attributes - Brand
Howards Cams
Product Attributes - Manufacturer's Part Number
122521-15
Product Attributes - Part Type
Camshafts
Product Attributes - Product Line
Howards Cams Hydraulic Flat Tappet Camshafts
Product Attributes - UPC
840793106776
Product Attributes - Cam Style
Hydraulic flat tappet
Product Attributes - Camshaft Use
Marine/Strip
Product Attributes - Camshaft Manufacturers Description
Fair idle. Excellent in performance and marine applications.
Product Attributes - Basic Operating RPM Range
1,600-5,600
Product Attributes - Intake Duration at 050 inch Lift
221
Product Attributes - Exhaust Duration at 050 inch Lift
235
Product Attributes - Duration at 050 inch Lift
221 int./235 exh.
Product Attributes - Advertised Intake Duration
275
Product Attributes - Advertised Exhaust Duration
289
Product Attributes - Advertised Duration
275 int./289 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
0.504 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
0.504 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio
0.504 int./0.504 exh.
Product Attributes - Lobe Separation (degrees)
115
Product Attributes - Camshaft Gear Attachment
3-bolt
Product Attributes - Remanufactured
No
Product Attributes - Computer-Controlled Compatible
No
Product Attributes - Valve Springs Required
Yes
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Howards Cams
StreetFX SKU hrs122521-15
SFX Item ID 5100392
Supplier Item Code 5100392
Manufacturer SKU 122521-15
Manufacturer UPC 840793106776
Alternative References HRC122521-15

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1967
    Ending Year1969
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.0L/427
  • MakeCHEVROLET
    Beginning Year1967
    Ending Year1970
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size6.5L/396
  • MakeCHEVROLET
    Beginning Year1970
    Ending Year1972
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size6.6L/402
  • MakeCHEVROLET
    Beginning Year1970
    Ending Year1990
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
  • MakeCHEVROLET
    Beginning Year1991
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454

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