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GSC Power Division engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full GSC Power Division lineup with fast shipping and expert fitment support — order with confidence.
Maximize your Subaru BRZ or Scion FR-S engine efficiency with the GSC Power Division 21-4N Chrome Polished Intake Valves. Engineered for enthusiasts who demand precision, these +1mm oversized valves (36mm head) are designed to optimize airflow and improve volumetric efficiency in your FA20 powerplant. Whether you are building a high-compression naturally aspirated engine or a forced induction setup, these valves provide the durability and flow characteristics required for peak performance.
The 21-4N stainless alloy construction ensures superior heat resistance and structural integrity under high-RPM conditions. By increasing the intake valve size, you allow for a greater volume of air-fuel mixture to enter the combustion chamber, directly contributing to increased horsepower and torque gains. These valves are precision-machined to meet tight tolerances, ensuring a perfect seat and long-lasting reliability. When upgrading your valvetrain, trust the engineering excellence of GSC Power Division to deliver the results you need. Experience the difference in engine response and power delivery with components sourced from GGCRACING.
| Brand | GSC Power Division |
|---|---|
| Manufacturer part number | 2124-8 |
| GGC SKU | GSC2124-8 |
| UPC / GTIN | GSC2124-8 |
Use the manufacturer part number when you compare with other listings or ask us to confirm a match.
| Box size | 10 × 6 × 2 in |
|---|---|
| Shipping weight | 2 lb |
Universal fit — check measurements. Compare the dimensions and specifications on this page with your application before you order.
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