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Howards Cams Hydraulic Flat Tappet Camshaft & Lifter Set
Howards Cams most popular computer designed performance hydraulic flat tappet cams are available as cam and lifter sets. These sets offer sizable torque, horsepower, and rpm increases at an affordable price. Each set includes a hydraulic flat tappet performance cam and a set of premium hydraulic lifters.
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 & Lifter Set
Application: Chevrolet Big Block V8 Mark IV 396-454 1965-1996
Ignition Firing Order: OE (1-8-4-3-6-5-7-2)
Cam Style: Hydraulic Flat Tappet
Basic RPM Range: 2500-6800
Manufacturers Description: Good idle, Street/Strip. Broad mid-range to upper end performance. 9.5:1+ CR.
Intake Duration @ .050": 241
Exhaust Duration @ .050": 247
Advertised Intake Duration (@ .006"): 294
Advertised Exhaust Duration (@ .006"): 301
Intake Valve Lift with OE Rocker Ratio (1.70): .570"
Exhaust Valve Lift with OE Rocker Ratio (1.70): .578"
Intake Lobe Lift: .335"
Exhaust Lobe Lift: .340"
Intake Valve Lift with 1.72 Rocker Ratio: .577"
Intake Valve Lift with 1.75 Rocker Ratio: .587"
Intake Valve Lift with 1.80 Rocker Ratio: .603"
Exhaust Valve Lift with 1.72 Rocker Ratio: .585"
Exhaust Valve Lift with 1.75 Rocker Ratio: .595"
Exhaust Valve Lift with 1.80 Rocker Ratio: .612"
Lobe Separation Angle: 112 Degrees
Intake Centerline: 108 Degrees
Lifters Included: Yes, 91111, Performance Hydraulic Flat Tappet
Small Base Circle: No
Cam Gear Attachment: 3-Bolt
Valve Adjustment: Zero Lash Plus ½ Turn
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: CL121721-12
Weight: 10.0 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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