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Howards Cams Retrofit Hydraulic Roller Camshafts 120255-12 Camshaft, Tappet, Advertised Duration 284/288, Lift .578/.618, Chevy, Big Block, Each

SKU: HRS120255-12

Camshafts

Howards Cams Retrofit Hydraulic Roller Camshafts 120255-12 Camshaft, Tappet, Advertised Duration 284/288, Lift .578/.618, Chevy, Big Block, Each

SKU: HRS120255-12

Camshafts
A$1,031.92
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

Howards Cams retrofit hydraulic roller camshafts offer more lift and more power for less money. These street performance grinds are perfect for those wanting to upgrade to hydraulic roller cams. Manufactured using the highest grade race-quality cores, Howards precision-grinds their cams to provide the quality and performance that you want at a reasonable price. Overhaul your valvetrain for mild to wild street performance with Howards Cams retrofit hydraulic roller camshafts. Hundreds of models are available for a wide range of vehicles from the 1950s and up.

Part Type

Hydraulic Roller Cam - BBC Max Torque

Data: v4.2 - Upd: 2026-09-29 03:36:26

Specifications

Product Attributes - Brand
Howards Cams
Product Attributes - Manufacturer's Part Number
120255-12
Product Attributes - Part Type
Camshafts
Product Attributes - Product Line
Howards Cams Retrofit Hydraulic Roller Camshafts
Product Attributes - UPC
840793105212
Product Attributes - Cam Style
Hydraulic roller, Retro-fit
Product Attributes - Camshaft Use
Street/Strip
Product Attributes - Camshaft Manufacturers Description
Fair idle, performance usage. Great midrange torque and power.
Product Attributes - Basic Operating RPM Range
2,400-6,000
Product Attributes - Intake Duration at 050 inch Lift
231
Product Attributes - Exhaust Duration at 050 inch Lift
235
Product Attributes - Duration at 050 inch Lift
231 int./235 exh.
Product Attributes - Advertised Intake Duration
284
Product Attributes - Advertised Exhaust Duration
288
Product Attributes - Advertised Duration
284 int./288 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
0.578 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
0.618 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio
0.578 int./0.618 exh.
Product Attributes - Lobe Separation (degrees)
112
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.
Product Attributes - Notes
Retrofit roller cam for engines that did not originally come with a roller cam.

Reference Information

Brand Name/s Howards Cams
StreetFX SKU hrs120255-12
SFX Item ID 5099298
Supplier Item Code 5099298
Manufacturer SKU 120255-12
Manufacturer UPC 840793105212
Alternative References HRC120255-12

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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