The BTR Truck Norris Camshaft is one of the most iconic and best-performing truck cams on the market. Developed by Brian Tooley Racing for Gen III & IV LS truck engines, this camshaft provides serious gains in horsepower and torque — plus that aggressive, unmistakable "choppy" idle enthusiasts love.
Ideal for street and performance truck builds, the Truck Norris cam delivers strong mid-range and top-end power while still maintaining excellent drivability.
Specifications
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Intake Duration (@ .050"): 212°
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Exhaust Duration (@ .050"): 22X°
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Valve Lift (Intake/Exhaust): .552"/.552"
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Lobe Separation Angle (LSA): 107°
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Camshaft Type: Hydraulic Roller
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Operating Range: 4000–7000 RPM
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Gear Attachment: 3-Bolt
Engine Compatibility
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4.8L / 5.3L / 5.7L / 6.0L / 6.2L LS engines
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Fits Gen III and Gen IV truck applications
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Designed for GM trucks and SUVs from 1999–2013 (Silverado, Sierra, Tahoe, Suburban, etc.)
Recommended Upgrades
To get the most from the Truck Norris Camshaft, we recommend:
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Valve Springs: Upgraded dual valve springs required
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Torque Converter: Minimum 2,400+ RPM stall recommended (for automatic transmissions)
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Tuning: ECU tuning required
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Cam Gear: Gen IV engines may need a 3-bolt conversion kit
Why Choose the Truck Norris Cam?
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Legendary cam profile known for power and aggressive sound
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Excellent drivability with noticeable idle lope
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Ideal for street, strip, and show builds
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Proven results in thousands of LS-based builds