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SKU: GSC2025-01
GSC Power-Division Chrome Polished Exhaust Valve – 29mm Head (STD) for Hyundai G4KF Theta / Mitsubishi 4B11T
The GSC Power-Division GSC2025-01 is a premium chrome-polished exhaust valve with a 29mm standard head diameter, designed for the Hyundai G4KF Theta and Mitsubishi 4B11T turbocharged engines. Manufactured to exact OEM specifications with superior materials and precision machining, this single exhaust valve offers improved heat resistance, better sealing, and enhanced durability for both stock and high-performance builds. The polished chrome finish reduces carbon buildup and improves flow characteristics, making it an excellent upgrade for street or track applications.
Key Features
- 29mm Standard Head Diameter – Direct OEM replacement size for perfect fitment
- Chrome Polished Finish – Reduces carbon adhesion and improves exhaust flow
- High-Strength Material – Engineered for superior heat and fatigue resistance in turbo applications
- Precision Machined – Tight tolerances ensure reliable sealing and long service life
- Single Valve – Sold individually for targeted repairs or custom builds
| Spec | Detail |
|---|---|
| Part Number | GSC2025-01 |
| Brand | GSC Power-Division |
| Type | Chrome Polished Exhaust Valve (STD) |
| Head Diameter | 29mm |
| Compatibility | Hyundai G4KF Theta and Mitsubishi 4B11T engines |
| Country of Origin | United States |
| Warranty | GSC Power-Division Limited Warranty |
Whats Included
- 1 x GSC Chrome Polished Exhaust Valve (29mm head, STD size)
Product Notes
- Direct replacement or upgrade for the exhaust valves in Hyundai G4KF Theta and Mitsubishi 4B11T turbo engines
- Chrome polishing helps resist carbon buildup and improves flow
- Ideal for stock rebuilds or high-boost performance applications
Installation Notes
- Requires cylinder head removal and professional valve job
- Estimated time: Part of full cylinder head service
- Always replace valve stem seals and perform proper break-in procedure
This Part Fits
| Compatibility | Notes |
|---|---|
| Hyundai G4KF Theta Engine | Turbocharged applications (single valve) |
| Mitsubishi 4B11T Engine | Turbocharged applications (single valve) |
Why Choose GSC Power-Division Valves?
- Premium materials and precision manufacturing for superior durability under boost
- Chrome polished finish reduces carbon buildup and improves performance
- Trusted by engine builders for high-performance and racing applications
Frequently Asked Questions
-
Q: Is this a single valve or a set?
A: Sold individually – one chrome polished exhaust valve (29mm head, STD size). -
Q: Will this fit my Hyundai or Mitsubishi turbo engine?
A: Yes, designed for the G4KF Theta and 4B11T turbocharged engines. -
Q: Do I need to replace all valves?
A: For best results, it is recommended to replace all exhaust valves during a full valve job.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Official GSC Power-Division retail packaging
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...
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