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SKU: 2124-8
GSC Power-Division 2013-2021 Subaru BRZ / Scion FR-S / Toyota 86 21-4N Chrome Polished Intake Valves - 36mm Head (+1mm) - Set of 8
GSC Power-Division intake valves (2124-8) deliver precise engineering for the FA20 engine in 2013-2021 Subaru BRZ, Scion FR-S, and Toyota 86 models. This set of 8 features a 36mm head diameter (+1mm over stock) and 21-4N stainless steel construction with chrome polishing for reliable high-RPM performance. Expect improved airflow and heat management during aggressive driving or track use.
Key Features
- 36mm Head Diameter (+1mm): Provides greater airflow volume compared to stock 35mm valves to support higher boost and RPM levels.
- 21-4N Stainless Steel: High-nickel content material resists fatigue and maintains shape under extreme valve train stress.
- Chrome Polished Finish: Reduces friction on stem and fillets for less guide wear and better heat dissipation.
- 5.965 Inch Overall Length: Exact OEM-matched dimensions ensure drop-in compatibility without valvetrain modifications.
- Swirl Polished Valve Head: Enhances flow efficiency across the intake port for measurable power gains.
Product Notes
- Designed as a complete set of 8 for full intake valve replacement during rebuilds.
- Inspect valve guides and seats prior to installation for optimal sealing.
- Special order item with standard ground shipping.
Installation Notes
- Professional installation recommended.
- Requires valve seat machining to accommodate +1mm head size.
- Compatible with stock retainers, springs, and keepers. measure clearances after install.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2013-2021 | Subaru | BRZ | All |
| 2013-2016 | Scion | FR-S | All |
| 2017-2021 | Toyota | 86 | All |
Why Choose GSC Power-Division?
- Proven in drag racing and endurance events with real-world testing data.
- Made in USA with tight tolerances for consistent performance.
- Backed by decades of valvetrain expertise for FA-series engines.
Frequently Asked Questions
-
Q: Will these valves fit 2022+ GR86 or BRZ models?
A: No, these are for FA20 engines only. 2022+ models use FA24 requiring different part numbers. -
Q: What makes 21-4N material different from standard stainless?
A: Higher nickel and controlled nitrogen improve heat resistance and prevent stem stretching at high temperatures. -
Q: Is a warranty included?
A: GSC offers a limited lifetime warranty against manufacturing defects when installed by certified professionals.
Shipping & Handling
- Method: Standard ground
- Availability: Special order - typically ships within 3-5 business days
- Packaging: Securely boxed for protection
- Weight: 1.1 lbs
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