SKU: 2133-8
GSC P-D 2014+ BRZ/FRS FA20 Exhaust Valve Set +1mm (30mm) 23-8N Stainless Alloy
Upgrade your Subaru BRZ, Scion FR-S or Toyota 86 FA20 engine with GSC Power-Division's +1mm exhaust valve set. These 30mm one-piece forged valves fit 2013+ models and deliver enhanced exhaust flow for higher power output in boosted or high-RPM builds. Precision-engineered for direct replacement during valve jobs, they handle extreme conditions with reliable strength.
Key Features
- 23-8N Stainless Alloy Construction: Forged one-piece design resists heat and fatigue for long-term performance in turbocharged FA20 engines
- +1mm Oversize (30mm Diameter): Increases exhaust flow over stock 29mm valves to support bigger cams, porting and forced induction setups
- Swirl Polished Finish: Reduces friction and improves airflow for quicker valve response and measurable horsepower gains
- Exact FA20 Specs: 6mm stem, 104.14mm length, 1.25mm margin and 5mm lock groove ensure drop-in fit with OEM or aftermarket guides
- Made in USA Set of 8: Complete exhaust valve kit covers both cylinder heads with consistent quality
Product Notes
- Requires valve seat machining for +1mm oversize installation
- Pair with GSC valve springs for optimal control at high RPM
- Securely packaged to prevent damage during transit
Installation Notes
- Professional installation recommended.
- Valve job needed: cut seats to 30mm and check stem clearance
- Compatible with OEM retainers, locks and GSC springs/seats
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2013-2016 | Scion | FR-S | Base, Premium, Limited |
| 2013-2021 | Subaru | BRZ | Base, Premium, Limited, tS |
| 2017-2020 | Toyota | 86 | Base, GT, Hakone Edition |
Why Choose GSC Power-Division?
- Proven in drag racing and track abuse on FA20 engines
- High-strength materials built for 1000+hp applications
- Engineered tolerances match factory specs while enabling mods
Frequently Asked Questions
-
Q: Will this fit 2013 BRZ/FR-S models?
A: Yes, GSC 2133-8 fits all 2013+ FA20DIT engines in BRZ, FR-S and 86 including early models with no modifications -
Q: What makes 23-8N stainless better than stock?
A: 23-8N alloy offers superior heat resistance and tensile strength over OEM Inconel, preventing stem stretch or recession under boost -
Q: What is the warranty on these valves?
A: Lifetime warranty against manufacturing defects when installed by certified shops. excludes abuse or improper machining
Shipping & Handling
- Method: Standard Ground
- Availability: In stock - ships same or next business day
- Packaging: Compact box measures 6in x 4in x 2in
- Weight: 1.00 lbs
GSC Power Division
GSC Power Division is a manufacturer of precision-engineered camshafts, valve springs, and valvetrain components designed for high-performance and competition engines across domestic, import, and diesel platforms. Founded by engineers with deep roots in motorsport, GSC Power Division components are machined to exacting tolerances and heat-treated to survive the demands of forced induction and high-rpm applications that destroy stock valvetrain parts. The brand is particularly well-known in the Mitsubishi Evo, Subaru STI, Nissan RB, and Toyota 2JZ communities where aggressive camshaft profiles are essential for extracting maximum power from turbocharged four-cylinder and six-cylinder engines. Whether building for drag racing, road course competition, or a high-powered street car, GSC Power Division camshafts and valve springs are a proven upgrade path. Popular Upgrades GSC Power Division S1, S2, and S3 camshafts are the most popular selections, with each profile offering progressivel...
View GSC Power Division Products
Valves
Welcome to our Valves collection, where quality meets functionality. Our carefully curated selection includes a variety of valves suited for different applications and industries. Whether you are in construction, manufacturing, or plumbing, we have the perfect valve solutions for you. Why Choose Our Valves? High Quality: Each valve in our collection is manufactured to meet strict quality standards, ensuring durability and reliability. Wide Range: We offer a diverse range of valves. Competitive Pricing: Get the best value for your money with our competitively priced valves without compromising on quality. Expert Support: Our knowledgeable team is here to help you find the right valve for your specific needs. Applications of Our Valves Our valves are versatile and can be used in a variety of engines for various makes and modles. Shop Now! Explore our Valves collection today and find the perfect solution for your project. With our user-friendly Shopify store, shopping for valv...
View Valves Products
Valves & Components
Browse all of our valves and valvetrain components at Black Ops Auto Works, including engine valves, valve covers, valve cover gaskets, valve guides, valve springs, retainers, valve locks, valve seals, lash caps, and related valvetrain hardware for performance builds, engine refreshes, and high-horsepower applications. Whether you are rebuilding a cylinder head, upgrading your valvetrain for higher RPM, or replacing worn valve train components, this collection is built for customers searching for engine valves, valve springs and retainers, valve cover gaskets, performance valve covers, and valvetrain upgrades. Shop Top Valvetrain Brands Find trusted brands in the valve and valvetrain category, including: GSC Power Division Supertech Brian Crower Ferrea Manley Performance Cometic Granatelli Moroso BLOX Racing These brands are known for performance intake valves, exhaust valves, valve spring kits, titanium retainers, valve guides, valve locks, valve seals, billet valve covers, an...
View Valves & Components Products


