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Technical Articles for Part Number ISK-390025
Isky Hydraulic Flat Tappet Cam and Lifter Kits 390025
Part Number: ISK-390025
Isky Hydraulic Flat Tappet Cam and Lifter Kits
Camshaft Kit, Hydraulic Flat Tappet, Advertised Duration 256/256, Lift 0.425/0.425, Chrysler, Dodge, Plymouth, Small Block, LA, Kit
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Estimated Ship Date: Jun 15, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
390025
Part Type:
Product Line:
Summit Racing Part Number:
ISK-390025
Cam Style:
Hydraulic flat tappet
Basic Operating RPM Range:
1,500-4,800
Camshaft Use:
Street
Camshaft Manufacturers Description:
Best torque and economy in passenger cars and trucks with smooth idle. Produces good vacuum and is computer compatible as well as compatible with up to 600 CFM carburetors. Standard axle ratio and max compression of 9.5:1.
Intake Duration at 050 inch Lift:
202
Exhaust Duration at 050 inch Lift:
202
Duration at 050 inch Lift:
202 int./202 exh.
Advertised Intake Duration:
256
Advertised Exhaust Duration:
256
Advertised Duration:
256 int./256 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.425 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.425 in.
Valve Lift with Factory Rocker Arm Ratio:
0.425 int./0.425 exh.
Lobe Separation (degrees):
112
Grind Number:
256-Supercam
Computer-Controlled Compatible:
Yes
Lifters Included:
Yes
Lifter Style:
Hydraulic flat tappet
Valve Springs Included:
Yes
Valve Spring Style:
Standard
Outside Diameter of Outer Spring (in.):
1.430 in.
Retainers Included:
Yes
Locks Included:
No
Valve Stem Seals Included:
No
Timing Chain and Gears Included:
No
Assembly Lubricant Included:
No
Pushrods Included:
Yes
Intake Overall Length (in.):
7.265 in.
Exhaust Overall Length (in.):
7.265 in.
Rocker Arms Included:
No
Gaskets Included:
No
Valve Springs Required:
Yes
Quantity:
Sold as a kit.
Isky Hydraulic Flat Tappet Cam and Lifter Kits
Isky hydraulic flat tappet cam and lifter kits are designed for performance-minded car owners who want to use their everyday cars for the street and drags. They produce more power and rpm in road-driven cars, while giving you the power and torque needed to get off the line quickly at the strip. Made from the finest high-quality proferal cast iron billets, these hydraulic flat tappet cams are flame-hardened, super-finished, and Parko Lubrite coated for a long life. Order the model recommended for your vehicle and engine application.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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