GPI High Lift LS Camshaft for GM Trucks - 8620 Hardened Core Upgrade (4.8L / 5.3L / 6.0L / 6.2L) - HLT3-8620
Upgraded High Lift Performance Camshaft with 8620 Hardened Core
The GPI HLT3-8620 High Lift LS Camshaft is the enhanced, durability-focused version of the popular HLT3 - engineered with an 8620 hardened core for superior wear resistance, improved longevity, and added strength under aggressive performance use. Designed for 4.8L, 5.3L, 6.0L, and 6.2L LS engines, this camshaft delivers a commanding performance idle and a strong mid- to upper-RPM powerband starting around 2,750 RPM.
The HLT3-8620 works exceptionally well on stock bottom-end engines and becomes even more potent when paired with high-flow intake and exhaust systems and gear ratio upgrades. An increased stall converter and headers are required for proper operation.
Why Choose the 8620 Hardened Core?
The 8620 upgrade creates a significantly tougher camshaft by increasing surface hardness while maintaining ductile core strength. This produces:
- Improved lobe wear resistance
- Stronger overall camshaft structure
- Longer service life under aggressive spring pressures
- Superior durability for high-performance or hot rod applications
High Lift Performance Series Overview
The HLT3 and HLT4 cams make up GPI's High Lift Performance series - built for enthusiasts who want a more aggressive sound, harder acceleration, and strong RPM capability. These cams are extremely popular in Silverados, Sierras, Tahoes, Suburbans, and countless LS-swapped hot rods.
Cam Specs - HLT3-8620
- Part Number: HLT3-8620
- Duration (Int/Exh): 220 / 224
- Lift (Int/Exh): .629 / .629
- LSA: 111
- ICL: +4
- RPM Range: 2,750+ RPM
- Converter Required: Yes - increased stall required
- Headers Required: Yes
- Core Material: 8620 Hardened Steel
Performance Highlights
- Upgraded 8620 hardened core for superior durability
- Aggressive "big cam" idle with strong top-end pull
- Ideal for LS truck performance builds and hot rods
- Excels with high-flow intake/exhaust upgrades
- Designed to withstand increased spring pressures
Quick Specs
- Part Number: HLT3-8620
- Fitment: 4.8L / 5.3L / 6.0L / 6.2L GM LS Engines
- Idle Quality: Aggressive
- Required Mods: Stall converter, headers
- Recommended Mods: High-flow intake/exhaust, gear upgrades
- Core Type: 8620 Hardened Core
Fitment
- Chevrolet Silverado (4.8L / 5.3L / 6.0L / 6.2L)
- GMC Sierra (4.8L / 5.3L / 6.0L / 6.2L)
- Chevrolet Tahoe
- GMC Yukon / Yukon XL
- Chevrolet Suburban
- Chevrolet Avalanche
- LS-swapped hot rods, street rods, and custom builds
FAQs
What makes the 8620 version better than the standard HLT3?
The 8620 core dramatically increases surface hardness and wear resistance, making it ideal for long-term durability under high spring pressures and aggressive use.
Do I need supporting modifications?
Yes. The HLT3-8620 requires headers and an upgraded stall converter. High-flow intake and exhaust components further improve performance.
Why Buy from Beefcake Racing?
Beefcake Racing delivers expert guidance, real-world performance experience, and fast shipping on all GPI camshafts.
Call 1-855-827-7223 or email sales@beefcakeracing.com.
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