GPI LS Turbo Camshaft - with 8620 Hardened Core Upgrade - LS SS4 Turbo (2010 - 2015 Camaro | 2014 - 2019 C7 Corvette) - TC-STG4-8620
Ultimate 8620-Hardened Turbo Cam for Street/Strip & Race LS Builds
The GPI TC-STG4-8620 SS4 Turbo Camshaft is the most aggressive turbo grind available for 6.0 - 6.2L LS engines, now enhanced with the extremely durable 8620 hardened core. Designed for serious street/strip and full race turbo applications, this cam delivers dominant mid-range punch and exceptional high-RPM horsepower, making it a top-tier choice for Camaro and C6/C7 Corvette turbo builds running moderate to aggressive boost.
The 8620 core upgrade increases surface hardness and durability under high valve spring loads, ensuring stability and longevity in high-boost environments. This upgrade maintains the ductility required for street use but adds the resilience needed for race-level abuse.
Race-Bred Performance with Street/Strip Manners
The SS4 Turbo cam is known for its performance idle with a crisp turbo lope, offering unmistakable character without compromising the ability to street drive the vehicle - when paired with proper supporting mods. This cam thrives in builds using high-stall converters, free-flowing race exhaust, and optimized final drive gearing.
Turbo LS Camshaft Overview
GPI's turbo cam lineup is widely regarded as the benchmark for LS2, L76, and LS3 turbo applications using LS3/L92 rectangle-port heads. These cams have propelled 5th Gen Camaros and C6/C7 Corvettes to sub-10-second quarter-mile times while retaining impressive drivability for their performance class.
With four distinct turbo cam options, the SS4 sits at the top - built for drivers demanding maximum turbocharger efficiency, superior spool, and extreme top-end power.
Stage 4 Turbo Cam Specs - TC-STG4-8620
- Duration (Int/Exh): 229 / 236
- Valve Lift (Int/Exh): .646 / .637
- LSA: 115
- ICL: +4
- Core Material: 8620 Hardened Steel
Performance Characteristics
- Performance idle with a crisp, controlled turbo "lope"
- Extremely strong mid-range and high-RPM horsepower
- Engineered for moderate to high boost turbo systems
- Requires high stall-speed torque converter
- Requires race exhaust for proper flow
- Benefits from optimized final drive gearing
- Valve springs and pushrods required
- 8620 hardened core provides superior durability under high load
Quick Specs
- Engine: 6.0 - 6.2L LS Turbo
- Core: 8620 Hardened Steel
- Duration: 229 / 236
- Lift: .646 / .637
- LSA / ICL: 115 / +4
- Boost Range: Moderate to aggressive
- Converter: High stall required
- Exhaust: Free-flowing racing exhaust
- Valvetrain: Upgraded springs & pushrods required
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 upgrade necessary for a boosted SS4 build?
It's highly recommended. Turbo applications generate significant valvetrain load, and the 8620 core dramatically improves camshaft life and wear resistance.
What supporting mods does the SS4 require?
A high-stall converter, free-flowing race exhaust, optimized gearing, and upgraded valve springs and pushrods are required for proper performance and reliability.
Why Buy from Beefcake Racing?
Beefcake Racing provides expert turbo LS support, competitive pricing, and fast shipping. From valvetrain upgrades to complete turbo systems, we help you build a setup that performs on the street and dominates the track.
Call 1-855-827-7223 or email sales@beefcakeracing.com.
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