GPI L83 / L84 (5.3L) DI Truck High Lift Cams - STG2 (2014 GMC Sierra 1500 5.3L / Chevy Silverado) - L83HL2
Stage 2 High Lift Camshaft for 5.3L Direct Injected GM Trucks
The GPI L83HL2 is the Stage 2 high lift camshaft engineered for enthusiasts who want more power in the midrange and upper RPM band while still retaining excellent street manners. Designed specifically for the L83 / L84 5.3L Direct Injected GM truck platform, this cam delivers harder acceleration, stronger top-end pull, and a more aggressive overall driving experience than the STG1.
Just like all cams in the GPI High Lift series, the L83HL2 features a refined, quiet lobe design, excellent valvetrain stability, and compatibility with both naturally aspirated and centrifugal supercharged builds. It is the ideal choice for street/strip truck owners who want more output without losing drivability.
Required Valvetrain & Install Notes
As a true high lift LT camshaft, the L83HL2 requires specific components to operate safely and reliably:
- Dual .660? valve springs required
- GPI 0° Phaser Limiter required
- No milling without checking piston-to-valve clearance (PTV)
- Flycutting may be required depending on setup
L83 engines have tighter piston design than LT1/L86, so PTV checks are essential before installation.
Excellent for NA & Centrifugal Blower Builds
The High Lift L83 cam lineup was designed around naturally aspirated performance, but thanks to the linear airflow characteristics of centrifugal superchargers, the L83HL2 is also extremely blower-friendly. If you are NA now but planning a blower later, this cam is a strong long-term choice.
Stage 2 Cam Specs - L83HL2
- Duration (Int/Exh): 215 / 230
- Valve Lift (Int/Exh): .630 / .630
- LSA: 114
- ICL: +4
Performance Characteristics
- Optimized for 3000+ RPM stall converters
- Rivals STG1 torque with 10 - 15 more horsepower up top
- Pulls strong to 6400 RPM
- Ideal for street/strip builds
- Pairs extremely well with centrifugal superchargers
- Requires GPI 0° Phaser Limiter
Quick Specs
- Engine: 5.3L L83 / L84
- Cam Type: High lift VVT DI truck cam
- Duration: 215 / 230
- Lift: .630 / .630
- LSA / ICL: 114 / +4
- RPM Capability: Strong to 6400 RPM
- Converter: 3000+ stall recommended
- Phaser Limiter: GPI 0° required
- Milling: Not recommended without PTV check
- Flycutting: May be required
Fitment
Chevrolet Silverado 1500 - 5.3L
- 2014 Chevrolet Silverado 1500 5.3L
GMC Sierra 1500 - 5.3L
- 2014 GMC Sierra 1500 5.3L
FAQs
Do I need a stall converter for the L83HL2?
Yes. A 3000+ RPM stall converter is recommended to take full advantage of the cam's powerband and drivability characteristics.
Can I run this cam with stock pistons?
Yes, but PTV checks are mandatory. The L83 piston design has reduced clearance, so flycutting may be required depending on your setup.
Why Buy from Beefcake Racing?
Beefcake Racing provides expert support for LT and DI truck platforms, offering the full GPI lineup along with the components needed for a proper installation. Our team can help you match the right converter, springs, limiter, and supporting mods for your build.
Call 1-855-827-7223 or email sales@beefcakeracing.com.
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