GPI LT1 NA Stroker Cam - Stroker STG3 (2016 - 2024 Camaro | 2014 - 2019 C7 Corvette) - LT-STR3
All-Out NA Stroker Cam for Maximum RPM & Power
The GPI LT-STR3 Stroker STG3 camshaft is the most aggressive NA stroker cam in the GPI lineup - built for 416 - 454ci LT1/LT4 engines running extreme compression and chasing the highest possible naturally aspirated horsepower. This cam is designed for serious competitors who want to live at 7600 - 8200 RPM and are running the airflow, compression, and valvetrain necessary to support it.
For 416 - 427ci engines, the STG3 requires 15:1 compression to perform correctly. For 454ci combinations, 14.5 - 15:1 is acceptable. As with all advanced NA stroker packages, this cam is High Ram intake only - lower-flow manifolds will not support the intended RPM range or cylinder fill. A 5FPX to GPI 5000 stall converter (5000 - 6500 RPM range) is required for proper launch and drivability.
Engineered for 416" - 454" LT Stroker Performance
The STG3 is part of GPI's dedicated lineup of high-compression NA stroker cams for the LT platform. All applications must run the High RPM Spring Kit, and due to the compression and fueling requirements, E85 or C85 is mandatory. Pump gas is not recommended under any circumstances.
For rare edge cases where STG1 - 3 do not match a customer's exact combination, GPI offers custom-ground stroker cams.
STG3 NA Stroker Cam Specs - LT-STR3
- Duration (Int/Exh): 246 / 266
- Valve Lift (Int/Exh): .648 / .637
- LSA: 113
- ICL: +4
Performance Characteristics
- Most aggressive NA stroker cam in the GPI lineup
- Designed for 416 - 454ci engines with extreme compression
- RPM capability: 7600 - 8200 RPM with proper valvetrain
- Intended for 15:1 compression (416 - 427ci) or 14.5 - 15:1 (454ci)
- High Ram intake required
- Fuel: E85 or C85 only
- Converter: 5000 - 6500 stall recommended
- High RPM Spring Kit required
- For competitive NA builds seeking maximum top-end power
Quick Specs
- Engine: LT1/LT4 stroker (416 - 454ci)
- Duration: 246/266
- Lift: .648/.637
- Compression: 14.5 - 15:1
- Fuel: E85/C85
- Peak RPM: 7600 - 8200
- Intake: High Ram required
- Converter: 5000 - 6500
Fitment
Chevrolet Camaro
- 2016 Chevrolet Camaro
- 2017 Chevrolet Camaro
- 2018 Chevrolet Camaro
- 2019 Chevrolet Camaro
- 2020 Chevrolet Camaro
- 2021 Chevrolet Camaro
- 2022 Chevrolet Camaro
- 2023 Chevrolet Camaro
- 2024 Chevrolet Camaro
Chevrolet Corvette C7
- 2014 Chevrolet Corvette
- 2015 Chevrolet Corvette
- 2016 Chevrolet Corvette
- 2017 Chevrolet Corvette
- 2018 Chevrolet Corvette
- 2019 Chevrolet Corvette
FAQs
What compression ratio is required for the STG3 stroker cam?
416 - 427ci engines require 15:1 compression. 454ci engines perform correctly at 14.5 - 15:1.
Can I run this cam with anything other than a High Ram intake?
No. The airflow requirement and RPM range of the STG3 demand a High Ram manifold. Restrictive intake designs will severely limit performance.
Why Buy from Beefcake Racing?
Beefcake Racing specializes in LT1/LT4 stroker combinations and provides expert hardware matching along with fast shipping and top-tier customer support. Need build guidance?
Call 1-855-827-7223 or email sales@beefcakeracing.com.
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