The Howards Cams CL126615-12 Street Force Retro-Fit Hydraulic Roller Camshaft and Lifter Kit is designed for Chevy Big Block Mark IV engines seeking strong street performance with excellent drivability. This complete kit combines a Street Force hydraulic roller camshaft with matched retro-fit hydraulic roller lifters to deliver a lopey idle, strong midrange power, and reliable performance for hot street and mild bracket racing applications.

Howards Cams CL126615-12 Features:

• Street Force retro-fit hydraulic roller camshaft and lifter kit
• Matched camshaft and hydraulic roller lifters for proper compatibility
• Designed for Chevy Big Block Mark IV engines from 396–502 ci
• Operating range from 2400–6600 RPM
• Intake lift .538 in. with 1.7:1 rocker arms
• Exhaust lift .544 in. with 1.7:1 rocker arms
• Duration @ .050 in.: 235 degrees intake / 241 degrees exhaust
• Advertised duration: 287 degrees intake / 293 degrees exhaust
• 112-degree lobe separation angle
• 108-degree intake centerline
• Street Force 4 profile provides lopey idle and strong midrange power

Howards Cams CL126615-12 Notes:

• Stock OE valve springs cannot be used
• Requires thrust button for proper camshaft control
• Retro-fit hydraulic roller lifters are included in this kit
• Designed for engines with 4-barrel induction and good exhaust systems

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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