Howards Cams®, Hyd. Roller Cam & Lifter Set, Chev SB OE Roller, 247/253 @.050, .565/.580 110LS

Howards Cams® Hydraulic Roller Cam & Lifter Sets
These cams offer significant advantages of additional lift and more power compared to flat tappet designs. The latest in lobe design produces better throttle response and top end horsepower. Designed with fast ramp speeds to give you the most power possible while maintaining the easy maintenance of a hydraulic cam. Available from daily street performance, street/strip, to competition designs. Money saving cam and lifter sets include camshaft and a set of Howards Cams® premium O.E. style performance hydraulic roller lifters.

Part Type: Camshaft and Lifter Set
Application: Chevrolet Small Block 305/350 1987-1998 w/ Stepped Nose (Carbureted)
Ignition Firing Order: OE (1-8-4-3-6-5-7-2)
Camshaft/Lifter Style: Hydraulic Roller
Basic RPM Range: 2800-6600
Manufacturers Description: Rough idle, needs good heads. Good upper mid-range. Needs 3500+ stall.
Intake Duration @ .050": 247
Exhaust Duration @ .050": 253
Advertised Intake Duration (@ .006"): 300
Advertised Exhaust Duration (@ .006"): 306
Intake Valve Lift with OE Rocker Ratio (1.50): .565"
Exhaust Valve Lift with OE Rocker Ratio (1.50): .580"
Intake Lobe Lift: .377"
Exhaust Lobe Lift: .387" 
Intake Valve Lift with 1.55 Rocker Ratio: .584"
Intake Valve Lift with 1.60 Rocker Ratio: .603" 
Intake Valve Lift with 1.65 Rocker Ratio: .622" 
Exhaust Valve Lift with 1.55 Rocker Ratio: .600"
Exhaust Valve Lift with 1.60 Rocker Ratio: .619"
Exhaust Valve Lift with 1.65 Rocker Ratio: .638"
Lobe Separation Angle: 110 Degrees
Intake Centerline: 106 Degrees
Lifters Included: Yes, 91113, Hydraulic Roller
Small Base Circle: No 
Cam Gear Attachment: 3-Bolt 
Valve Adjustment: Zero Last Plus ½ Turn
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: CL180345-10
Weight: 16.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Set

Note: Stock (O.E.) valve springs cannot be used.