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SKU: 207-4203 | UPC: 672036008123
ARP 03-06 Evo 8/9 / 95-99 Eclipse 4G63 2nd Gen Head Stud Kit
ARP 207-4203 head stud kit upgrades 4G63 2nd generation cylinder heads on 2003-2006 Mitsubishi Lancer Evolution VIII/IX and 1995-1999 Eclipse GST/GSX Talon TSi models. Stud design maintains clamp load under extreme boost and heat for reliable head gasket sealing. Engine builders trust this kit for rebuilt and high horsepower 4G63 applications from street daily drivers to drag strip monsters.
Key Features
- Genuine ARP Fasteners: 8740 chromoly steel construction resists fatigue and provides even clamping pressure across the head gasket
- Stud Design: Minimizes main block thread damage during repeated removals while ensuring accurate torque values every time
- Precision-Rolled Threads: Increases thread strength by 30 percent over cut threads for better pull-down force and resistance to loosening
- Matched Hardness Washers: Parallel ground 12-point nuts and hardened washers distribute load evenly to prevent warping
- Track-Proven Durability: Handles 40 plus psi boost levels in 4G63 builds without failure for consistent power delivery
Product Notes
- Inspect head and block deck surfaces for flatness before assembly to ensure proper sealing
- Apply ARP Ultra-Torque lubricant on studs and under nut faces for precise torque readings
- Arrives in protective ARP-branded box ready for immediate use or storage
Installation Notes
- Professional installation recommended.
- Torque studs to 65 ft-lbs in three steps using ARP sequence diagram included with kit
- Compatible with OEM head bolts holes, no machining required on 2nd gen 4G63 heads
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1995-1998 | Eagle | Talon | TSi |
| 1995-1999 | Mitsubishi | Eclipse | GST |
| 1995-1999 | Mitsubishi | Eclipse | GSX |
| 1996-1999 | Mitsubishi | Eclipse Spyder | GST |
| 1996-1999 | Mitsubishi | Eclipse Spyder | GSX |
| 2003-2005 | Mitsubishi | Lancer Evolution VIII | Evo 8 |
| 2006 | Mitsubishi | Lancer Evolution IX | Evo 9 |
Why Choose ARP?
- Decades of motorsport experience in NHRA and SCCA racing teams
- Every fastener tested to 200000 psi tensile strength ratings
- Engineered in the USA with exact fit for OEM replacement
Frequently Asked Questions
-
Q: Will this kit fit 2003-2006 Evo 8 and Evo 9 models?
A: Yes ARP 207-4203 matches the 2nd design 4G63 head bolt pattern on all 2003-2005 Evolution VIII and 2006 Evolution IX variants with 2.0L DOHC engine -
Q: What material and finish does ARP use on these studs?
A: High-grade 8740 chromoly alloy steel with black oxide finish for corrosion resistance and precise thread rolling -
Q: What is the warranty and torque procedure?
A: ARP provides defect warranty, torque to 65 ft-lbs using Ultra-Torque lube in provided sequence, recheck after 100 miles of heat cycles
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Secure foam-lined box measuring 9 x 7 x 1.5 inches
- Weight: 1.8 lbs
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ARP (Automotive Racing Products) is the world’s premier manufacturer of high-strength engine and driveline fasteners—head studs and bolts, main studs, rod bolts, and more—engineered and manufactured in-house from start to finish for race-proven reliability. With vertically integrated processes that include cold heading, machining, heat-treating, thread rolling after heat treat, and rigorous QA, ARP maintains aerospace-level certifications (ISO 9001 and AS9100) and validates every part for repeatable clamp load and fatigue resistance. Signature alloys such as 8740 chromoly, ARP2000, L19, and Custom Age 625+ deliver ultimate tensile strengths up to the super-alloy range, while ARP Ultra-Torque fastener assembly lubricant helps achieve consistent pre-load during installation. From street performance builds to professional motorsport programs, ARP fasteners provide precise fitment, superior metallurgy, and the durability needed to keep engines together at elevated cylinder pressures and...
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