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SKU: 207-4302 | UPC: 672036040482
ARP 94+ Mitsubishi 4G63 M11 Custom Age 625+ Head Stud Kit
ARP 207-4302 head stud kit upgrades 1994 and later Mitsubishi 4G63 DOHC engines with M11-threaded Custom Age 625+ Inconel studs. Fits Eclipse GST GSX Talon TSi Spyder Lancer Evolution and Laser models for consistent clamping under high boost and heat. Prevents head lift and gasket failure in street and race builds.
Key Features
- Custom Age 625+ Material: Inconel alloy studs rated at 260,000 psi tensile strength resist fatigue in extreme turbo applications
- M11 Stud Design: Eliminates block thread wear versus bolts while allowing accurate cylinder head alignment
- Precision-Rolled Threads: Provides 1000 percent stronger threads than cut threads for repeatable torque values
- Complete Hardware Set: Includes 10 studs hardened washers and 12-point nuts for direct bolt-on replacement
- High-Clamp Load: Maintains seal integrity past 50 psi boost in 4G63 builds
Product Notes
- ARP part number 207-4302 MPN confirmed for 4G63 DOHC turbo and non-turbo heads
- Use ARP Ultra-Torque lubricant on threads and under washers only
- Product weight 2.1 lbs ships in compact protective box
Installation Notes
- Professional installation recommended.
- Chase block threads with tap before install to ensure engagement
- Torque in ARP-specified sequence to 85-95 ft-lbs dry or per lube instructions
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1994-1998 | Eagle | Talon | TSi |
| 1994 | Mitsubishi | Eclipse | GS |
| 1994-1999 | Mitsubishi | Eclipse | GST |
| 1994-1999 | Mitsubishi | Eclipse | GSX |
| 1996-1999 | Mitsubishi | Eclipse Spyder | GST |
| 2003-2006 | Mitsubishi | Lancer Evolution | |
| 2005-2006 | Mitsubishi | Lancer Evolution | MR |
| 2005-2006 | Mitsubishi | Lancer Evolution | RS |
| 2006 | Mitsubishi | Lancer Evolution | SE |
| 1994 | Plymouth | Laser | RS |
Why Choose ARP?
- Fasteners used in NHRA Top Fuel and Pro Stock racing engines
- Every stud individually inspected for thread accuracy
- Engineered and manufactured in Southern California USA
Frequently Asked Questions
-
Q: Does this fit 2003-2006 Mitsubishi Lancer Evolution 4G63 heads?
A: Yes ARP 207-4302 confirmed for Evo 8 and Evo 9 4G63 DOHC cylinder heads -
Q: What alloy is used in these head studs?
A: Custom Age 625+ proprietary Inconel with superior corrosion and heat resistance over 2000 degrees F -
Q: Is a warranty included with this kit?
A: ARP provides replacement warranty for manufacturing defects when installed and torqued per instructions
Shipping & Handling
- Method: UPS Ground or USPS Priority Mail
- Availability: In stock - ships same or next business day
- Packaging: ARP branded box approximately 10 x 6 x 2 inches
- Weight: 2.1 lbs
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