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SKU: 2005-8 | UPC: GSC2005-8
GSC P-D 4G63T Evo1-9 DSM 90-98 Chrome Polished Super Alloy Exhaust Valve 30.5mm Head STD SET 8
GSC Power-Division exhaust valves feature forged super alloy construction for 4G63T engines in Mitsubishi Lancer Evolution 1-9 DSM Eagle Talon Plymouth Laser Mitsubishi Eclipse Galant 1990-2006. This set of 8 valves with 30.5mm standard head diameter handles high boost levels and extreme RPM in tuned turbo setups. Drivers achieve consistent exhaust flow heat management and reliability in drag racing time attack builds.
Key Features
- Super Alloy Material: Forged one-piece design resists high temperatures detonation in boosted 4G63T applications
- Chrome Polished Stems: Reduces guide wear friction improves heat dissipation to valve seats
- Swirl Polished Heads: Enhances exhaust gas flow for better scavenging power output across RPM range
- 30.5mm STD Head Diameter: Direct stock replacement with upgraded durability for Evo DSM cylinder heads
- Set of 8 Valves: Complete exhaust valve kit matches GSC intake valves for balanced valvetrain performance
Product Notes
- Inspect valve guides seats before installation for proper clearance
- Use high-quality assembly lube on stems during install to prevent scoring
- Store in original packaging to protect chrome finish from contaminants
Installation Notes
- Professional installation recommended.
- Valve stem diameter 5.5mm requires stock guide compatibility verification
- Compatible with OEM retainers springs keepers no modifications needed
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1990-1998 | Eagle | Talon | TSi |
| 1990-1994 | Mitsubishi | Eclipse | GS |
| 1990-1999 | Mitsubishi | Eclipse | GST |
| 1990-1999 | Mitsubishi | Eclipse | GSX |
| 1996-1999 | Mitsubishi | Eclipse | Spyder GST |
| 1991-1992 | Mitsubishi | Galant | VR-4 |
| 2003-2005 | Mitsubishi | Lancer Evolution | I II III VIII MR RS |
| 2005-2006 | Mitsubishi | Lancer Evolution | IX SE |
| 1990-1994 | Plymouth | Laser | RS |
Why Choose GSC Power-Division?
- Proven in drag racing time attack with 4G63T builds worldwide
- Engineered for 50psi boost 10k RPM durability
- Precision machined in USA for exact fit flow characteristics
Frequently Asked Questions
-
Q: Will these valves fit Evo 8 9 4G63 heads?
A: Yes set matches Evo 1-9 DSM 90-98 4G63T exhaust ports perfectly stock head size -
Q: What material provides the chrome polished finish?
A: Stems feature electroless nickel chrome plating over super alloy core for wear resistance thermal conductivity -
Q: Do these require special springs retainers?
A: Designed for OEM aftermarket springs up to 14mm lift compatible with GSC beehive springs
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Foam protected box 7 x 5 x 1.5 inches
- Weight: 0.75 lbs
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