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Howards Cams American Muscle™ Hydraulicl Flat Tappet Camshaft & Lifter Set
Near duplicated of some of the most iconic original equipment camshafts grinds from the ‘60s to the early ‘70s. We took these fantastic grinds and made slight changes to the ramp speeds and minor duration changes to give you better reliability and horsepower. You still get the same throttle response and of course the original style exhaust rumble. Great cams for restoration projects and perfect for the street machines.
Manufactured on Dedicated High Precision Machines
Held to Strict Tolerances
High grade quality cores
Rockwell Tested & Parkerized Ensuring the Highest Quality
Includes Matching Premium Lifters
Part Type: Camshaft and Lifter Set
Application: Chevrolet Big Block 262-400 1955-1996
Ignition Firing Order: OE (1-8-4-3-6-5-7-2)
Camshaft/Lifter Style: Hydraulic Flat Tappet
Basic RPM Range: 1200-4600
Manufacturers Description: Near duplicate of the Chev L78 425HP/427 cam (GM #3883986).
Intake Duration @ .050": 210
Exhaust Duration @ .050": 213
Advertised Intake Duration (@ .006"): 346
Advertised Exhaust Duration (@ .006"): 348
Intake Valve Lift with OE Rocker Ratio (1.70): .473"
Exhaust Valve Lift with OE Rocker Ratio (1.70): .473"
Intake Lobe Lift: .278"
Exhaust Lobe Lift: .278"
Intake Valve Lift with 1.72 Rocker Ratio: .479"
Intake Valve Lift with 1.75 Rocker Ratio: .487"
Intake Valve Lift with 1.80 Rocker Ratio: .501"
Exhaust Valve Lift with 1.72 Rocker Ratio: .479"
Exhaust Valve Lift with 1.75 Rocker Ratio: .487"
Exhaust Valve Lift with 1.80 Rocker Ratio: .501"
Lobe Separation Angle: 113 Degrees
Intake Centerline: 109 Degrees
Lifters Included: Yes, 91111, Performance Hydraulic Flat Tappet
Small Base Circle: No
Cam Gear Attachment: 3-Bolt
Valve Adjustment: Zero Lash Plus ˝ Turn
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: CL127061-13
Weight: 14.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Each
Note: Oil with ZDDP or ZDDP Additive Required
Note: Stock (O.E.) valve springs cannot be used.
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