Description
4-Pattern 229/239 IB 231/241 OB Hydraulic Roller Cam Chevrolet Big Block 396-454Hydraulic Roller: 4-Pattern 281QI09 – Best choice for street 396-454 c.i.d. engines with good cylinder heads. Very wide power range. 2600+ Stall.
Advertised Inboard Exhaust Duration: 293 DD
Advertised Inboard Intake Duration: 281 DD
Advertised Outboard Exhaust Duration: 295 DD
Advertised Outboard Intake Duration: 283 DD
Assembly Lubricant Included: No
Basic Operating RPM Range: 2 400-6 700 R3
Cam Type: Hydraulic Roller
Camshaft Gear Attachment: 3-Bolt
Camshaft Material: Billet Steel
Camshaft Series: 4-Pattern
Engine Family: Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
Grind Number: 281QIO9
Inboard Exhaust Duration at .050 inch Lift: 239 DD
Inboard Exhaust Valve Lift: 0.644″
Inboard Intake Duration at .050″ Lift: 229 DD
Inboard Intake Valve Lift: 0.658″
Lifter Type: Hydraulic Roller
Lifters Included: No
Outboard Exhaust Duration at .050 inch Lift: 241 DD
Outboard Exhaust Valve Lift: 0.648 Inch
Outboard Intake Duration at .050 Inch Lift: 231 DD
Outboard Intake Valve Lift: 0.661 Inch
Usage: Street/Performance
Valve Springs Required: Yes
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