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Howards Cams Rattler Hydraulic Flat Tappet Camshaft
Rattler™ cams are for street enthusiasts who want the classic exhaust sound, but also want true performance to go with it. They give you the performance and throttle response you expect from a performance cam. Advance lobe design and years of design experience is the difference. Don't let the others fool you. Sound is not everything. If you want both sound and performance, you need a Howards Cams Rattler. The best of both worlds.
Note: To get the best exhaut tone, you should use a good dual exhaust system without a cross-over. A cross-over will add minor performance, but mellow the exhaust tone.
Note: Always use Camshaft Break-In Lube with all new flat tappet cams.
Manufactured on Dedicated High Precision Machines
Held to Strict Tolerances
High grade quality cores
Rockwell Tested & Parkerized Ensuring the Highest Quality
Part Type: Camshaft
Application: Cadillac 368-425-472-500 1968-1984
Ignition Firing Order: OE (1-5-6-3-4-2-7-8)
Cam Style: Hydraulic Flat Tappet
Basic RPM Range: 1800-5600
Manufacturer's Description: Rattler, Choppy idle. High performance street, stock converter ok, best with 1800+ and gears.
Intake Duration @ .050": 227
Exhaust Duration @ .050": 235
Advertised Intake Duration (@ .006"): 281
Advertised Exhaust Duration (@ .006"): 289
Intake Valve Lift with OE Rocker Ratio (1.65): .517"
Exhaust Valve Lift with OE Rocker Ratio (1.65): .517"
Intake Lobe Lift: .313"
Exhaust Lobe Lift: .313"
Intake Valve Lift with 1.70 Rocker Ratio: .532"
Intake Valve Lift with 1.75 Rocker Ratio: .548"
Exhaust Valve Lift with 1.70 Rocker Ratio: .532"
Exhaust Valve Lift with 1.75 Rocker Ratio: .548"
Lobe Separation Angle: 109 Degrees
Intake Centerline: 103 Degrees
Includes Lifters: No
Small Base Circle: No
Cam Gear Attachment: Single-Bolt
Valve Adjustment: Zero Lash Plus 1/2 Turn
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: 528021-09
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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