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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
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