SKU: MEVI-1008-8 | UPC: 01037721244793
Supertech Mitsubishi 4G63/4G63T Inconel Exhaust Valve - +1mm Oversize - Set of 8 (1983-1999 Eclipse Talon Laser Galant Starion)
Supertech Inconel exhaust valves +1mm oversize deliver a complete set of 8 for Mitsubishi 4G63/4G63T engines in Eclipse GSX GST Talon TSi Laser Galant VR4 and Starion models. These valves manage high boost levels and extreme exhaust temperatures in turbocharged performance builds. Engine builders rely on them for dependable operation and better airflow in demanding applications.
Key Features
- Inconel 751 Material: Nickel-chromium alloy withstands 1525°F exhaust temperatures resists fatigue and corrosion in turbocharged engines
- +1mm Oversize 32.4mm Head Diameter: Increases exhaust flow for more power at high RPM when paired with matching seats
- Swirl Polished Head: Improves flow efficiency cuts turbulence and aids cylinder scavenging
- 7mm Stem 110.25mm Length: Provides strength and reduced weight for accurate valve train operation
- One-Piece Forged Design: CNC machined for precise fit and greater durability compared to stock cast valves
Product Notes
- Designed for high performance turbocharged 4G63/4G63T engine rebuilds
- Pair with Supertech dual valve springs for optimal performance
- Packaged in protective case inside sturdy box measuring 6 x 4 x 2 inches
Installation Notes
- Professional installation recommended.
- Machine cylinder head for +1mm oversize valve seats and guides
- Compatible with OEM or ported 4G63/4G63T heads no special hardware required
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1990-1999 | Mitsubishi | Eclipse | GS-T GSX |
| 1989-1992 | Mitsubishi | Galant | VR-4 |
| 1983-1989 | Mitsubishi | Starion | ESI-R Turbo |
| 1990-1994 | Eagle | Talon | TSi |
| 1990-1994 | Plymouth | Laser | RS Turbo |
Why Choose Supertech?
- Valves tested in World Challenge drag racing and endurance events
- Aerospace grade materials with strict quality control
- Precision engineering ensures exact fit and extended service life
Frequently Asked Questions
-
Q: Do these fit 2G Eclipse GSX 4G63T?
A: Yes fits all 1990-1999 Mitsubishi Eclipse GS-T GSX 1990-1994 Talon TSi Laser RS and Galant VR-4 Starion with 4G63/4G63T DOHC engines -
Q: Why Inconel over stainless steel?
A: Inconel 751 delivers better high temperature strength corrosion resistance and fatigue life for boost levels over 30psi -
Q: What warranty applies?
A: Supertech offers 1 year warranty for street use lifetime for racing against manufacturing defects
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective case inside sturdy box 6 x 4 x 2 inches
- Weight: 0.9 lbs
Supertech
Located in San Jose, California, in the heart of Silicon Valley, Supertech was born from the same fertile ground as many other innovative companies. We utilize cutting-edge technology to fuel our growth and deliver the highest performance valves and valve train components available. Why Choose Supertech? Over 30 Years of Experience: Our legacy in the industry ensures top-quality products. Superior Performance: We provide valves and valve train components specifically designed for the racing market. Versatile Applications: Ideal for various types of racing, including: Drag Racing Rally Road Racing And more! Custom Solutions: If you can't find the perfect fit, we are always willing to work with you to custom manufacture the ideal solution for your specific needs. CUTTING EDGE TECHNOLOGY Trusted by the best in the industry, Supertech is committed to leveraging the latest advancements in technology to enhance performance and reliability. Experience the difference with our prod...
View Supertech 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


