GPI Low Lift LS Camshaft - LLT4 8620 Hardened Core Upgrade (4.8L / 5.3L / 6.0L / 6.2L) - LLT4-8620
High-Performance Low Lift Cam with Premium 8620 Hardened Core
The GPI LLT4 8620 camshaft brings all the aggressive sound and street/strip performance of the standard LLT4 but with the added strength of an 8620 hardened core. This upgraded metallurgy improves durability, reduces long-term wear, and provides a superior valvetrain interface - ideal for LS enthusiasts demanding maximum reliability under aggressive use.
Designed for 4.8L, 5.3L, 6.0L, and 6.2L LS truck engines, the LLT4 offers a big-cam idle with a usable RPM range beginning around 3,250 RPM. It's a strong choice for hot rod builds, street/strip trucks, and anyone wanting a more serious powerband without switching to high-lift valvetrain components.
Note: A stall converter and long-tube headers are required.
Why Choose the 8620 Hardened Core?
GPI's 8620 heat-treatment process produces a surface that is significantly more durable than standard cores. The lobes gain a hardened wear layer while maintaining core ductility - resulting in increased strength, longevity, and superior valvetrain stability. This makes the LLT4-8620 ideal for engines that see spirited use or frequent high-RPM operation.
Low Lift Performance Series
The LLT3, LLT4, and LLT5 cams form GPI's Low Lift Performance lineup. These cams deliver the sound and performance of traditional big cams with the added benefit of stock-style valvetrain compatibility. Perfect for LS swaps, street rods, and high-performance truck builds.
Cam Specifications - LLT4 8620
- Duration (Int/Exh): 22x / 23x
- Valve Lift (Int/Exh): .54x / .54x
- LSA: 111
- ICL: +3.5
- Operating Range: 3,250 RPM and up
- Converter Required: Yes
- Headers Required: Yes
- Core Material: 8620 Hardened Alloy
Performance Highlights
- Upgraded 8620 core for significantly improved durability
- Big-cam idle with strong throttle response
- Excellent midrange and top-end power
- Ideal for aggressive street/strip and hot rod applications
- Works best with high-flow intake, exhaust, and deeper gears
- Improved valvetrain longevity under high-RPM use
Why the LLT4-8620?
This hardened-core version of the LLT4 is built for enthusiasts who want the confidence of premium materials under demanding performance conditions. If your build sees frequent high RPM, heavy loads, or you simply want the best low-lift LS cam available, the 8620 upgrade is the smart move.
Quick Specs
- Part Number: LLT4-8620
- Duration: 22x / 23x
- Lift: .54x / .54x
- LSA: 111
- ICL: +3.5
- Required Mods: Headers, stall converter
- Engine Compatibility: 4.8L / 5.3L / 6.0L / 6.2L LS
- Core: 8620 hardened alloy
Fitment
Chevrolet Silverado / GMC Sierra
- 4.8L / 5.3L / 6.0L / 6.2L LS Engines (All Applicable Years)
Chevrolet Tahoe / Suburban
- 4.8L / 5.3L / 6.0L LS Engines (All Applicable Years)
GMC Yukon / Yukon XL
- 4.8L / 5.3L / 6.0L LS Engines (All Applicable Years)
Chevrolet Avalanche
- 5.3L / 6.0L LS Engines (All Applicable Years)
Hot Rod, Street Rod & LS Swap Applications
- Compatible with any 4.8L / 5.3L / 6.0L / 6.2L LS-based powertrain
FAQs
What advantages does the 8620 core provide?
The 8620 hardened core greatly increases wear resistance and maintains excellent ductility, making it superior for high-RPM or aggressive-use builds.
Do I need to upgrade my torque converter?
Yes. A higher stall converter (3,000+ RPM) is required due to the cam's operating range and drivability characteristics.
Why Buy from Beefcake Racing?
Beefcake Racing provides expert LS tech support, fast shipping, and guaranteed genuine GPI components. Need help picking the right cam?
Call 1-855-827-7223 or email sales@beefcakeracing.com.
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