GPI LS Turbo Camshaft - with 8620 Hardened Core Upgrade - LS SS3 Turbo (2010 - 2015 Camaro | 2014 - 2019 C7 Corvette) - TC-STG3-8620
High-Strength 8620 Turbo Camshaft for Serious LS Street & Race Builds
The GPI TC-STG3-8620 is the upgraded, hardened-core version of the legendary SS3 Turbo LS Camshaft - built for aggressive street and track turbo applications on 6.0 - 6.2L LS engines. Engineered for moderate to aggressive boost levels, this camshaft delivers crushing mid-range torque and exceptional high-RPM power while maintaining street-manageable behavior when paired with the correct supporting mods.
Featuring the 8620 hardened core upgrade, this billet steel camshaft offers superior durability and enhanced wear resistance compared to standard cores - making it ideal for high-load turbo applications. The hardened lobes maintain strength and longevity without losing the ductile characteristics needed for reliability in boosted LS engines.
Why Choose the 8620 Hardened Core?
GPI's 8620 treatment creates a more durable wear surface across each lobe, improving strength under extreme spring pressure and turbocharged cylinder pressures. This yields a longer-lasting camshaft with consistent performance, especially valuable for racing or high-mileage boosted vehicles.
Turbo LS Camshaft Overview
GPI's turbo cam lineup has become the gold standard for LS2, L76, and LS3 engines using LS3/L92 rectangle-port heads. These cams have powered countless builds - many pushing 9-second quarter-mile times - while retaining the drivability required for true dual-purpose street/strip setups.
The SS3 Turbo cam is the choice for enthusiasts wanting an aggressive, hard-hitting turbo camshaft that maintains usable drivability when paired with proper converter, gearing, and exhaust.
Stage 3 Turbo Cam Specs - TC-STG3-8620
- Duration (Int/Exh): 225 / 231
- Valve Lift (Int/Exh): .637 / .637
- LSA: 114
- ICL: +3.5
Performance Characteristics
- Performance idle with an aggressive turbo note
- Extremely strong mid-range and upper RPM power
- Ideal for moderate to high boost turbo systems
- Requires free-flowing performance or race exhaust
- Requires higher-stall torque converter for proper power delivery
- Benefits from optimized final drive gearing
- Valve springs and pushrods required
- 8620 hardened core provides superior longevity under boosted loads
Quick Specs
- Engine: 6.0 - 6.2L LS Turbo
- Core Material: 8620 hardened steel
- Duration: 225 / 231
- Lift: .637 / .637
- LSA / ICL: 114 / +3.5
- Boost Range: Moderate to aggressive
- Converter: Higher-stall required
- Valvetrain: Upgraded springs & pushrods required
- Gearing: Performance final drive recommended
Fitment
Chevrolet Camaro
- 2010 Chevrolet Camaro
- 2011 Chevrolet Camaro
- 2012 Chevrolet Camaro
- 2013 Chevrolet Camaro
- 2014 Chevrolet Camaro
- 2015 Chevrolet Camaro
Chevrolet Corvette C7
- 2014 Chevrolet Corvette
- 2015 Chevrolet Corvette
- 2016 Chevrolet Corvette
- 2017 Chevrolet Corvette
- 2018 Chevrolet Corvette
- 2019 Chevrolet Corvette
FAQs
Is the 8620 core worth it for a turbo LS build?
Yes - boosted applications place higher stress on valvetrain components, and the 8620 core significantly improves camshaft durability, making it ideal for long-term reliability under boost.
What supporting mods are required?
A higher-stall converter, free-flowing exhaust, correct gearing, and upgraded valve springs and pushrods are mandatory for proper performance and safety with this camshaft.
Why Buy from Beefcake Racing?
Beefcake Racing delivers expert guidance, fast shipping, and proven parts support for high-boost LS builds. From cams to converters, we help you build a turbo setup that performs on the street and dominates at the track.
Call 1-855-827-7223 or email sales@beefcakeracing.com.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
