SKU: 107-1003 | UPC: 672036041052
ARP 107-1003 Mitsubishi 4G63 Cam Tower Bolt Kit 1990-2006 Eclipse Talon Evo Galant
The ARP 107-1003 Cam Tower Bolt Kit replaces factory hardware on 4G63 DOHC engines with precision fasteners that maintain clamp load under high boost and RPM. Designed for DSM platforms including 1990-1999 Mitsubishi Eclipse GST GSX GS Talon TSi Laser RS Galant VR-4 and 2003-2006 Lancer Evolution. Keeps cam towers locked in place to support valvetrain stability and prevent oil leaks in performance applications.
Key Features
- ARP 8740 Chromoly Steel: Heat-treated construction rated to 200,000 psi tensile strength handles extreme cylinder pressures and heat cycles
- Rolled Threads: Formed after heat treatment for maximum fatigue resistance deeper thread engagement and accurate torque values
- Complete Matched Kit: Includes all required cam tower bolts studs and washers for front rear and intermediate towers
- Application-Specific Design: Direct replacement for 7-bolt 4G63 engines with no modifications needed
- Versatile Performance: Built for daily street driving drag racing and track days with consistent reliability
Product Notes
- Clean cylinder head and block threads completely before assembly to ensure proper torque
- Apply ARP Ultra-Torque fastener lubricant to threads and under washer faces per instructions
- Avoid cross-threading by hand-starting all fasteners
Installation Notes
- Professional installation recommended.
- Torque to ARP specs in sequence: 22-25 ft-lbs for most 4G63 cam tower positions using calibrated wrench
- Retorque after 500 miles or three heat cycles to account for fastener stretch
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1990-1999 | Mitsubishi | Eclipse | GSX |
| 1990-1999 | Mitsubishi | Eclipse | GST |
| 1990-1994 | Mitsubishi | Eclipse | GS |
| 1996-1999 | Mitsubishi | Eclipse Spyder | GST |
| 1990-1998 | Eagle | Talon | TSi |
| 1990-1994 | Plymouth | Laser | RS |
| 1991-1992 | Mitsubishi | Galant | VR-4 |
| 2003-2006 | Mitsubishi | Lancer Evolution | VIII |
| 2003-2006 | Mitsubishi | Lancer Evolution | IX |
| 2005-2006 | Mitsubishi | Lancer Evolution | MR |
| 2005-2006 | Mitsubishi | Lancer Evolution | RS |
| 2006 | Mitsubishi | Lancer Evolution | SE |
Why Choose ARP?
- Proven in NHRA Top Fuel and Pro Stock engines for decades
- Manufactured in USA with strict quality controls for zero defects
- Backed by ARP limited lifetime warranty against failure
Frequently Asked Questions
- Q: Does this fit 4G63 engines in 2004 Lancer Evolution VIII MR?
A: Yes ARP 107-1003 fits all 2003-2006 Lancer Evolution VIII and IX models including MR RS and SE with 4G63 - Q: What material and strength rating do these bolts have?
A: Forged 8740 chromoly steel heat-treated to 200,000 psi tensile strength with rolled threads for superior durability over stock - Q: What is the ARP warranty on this kit?
A: Limited lifetime warranty covers fastener breakage when properly installed torqued and maintained per ARP guidelines
Shipping & Handling
- Method: UPS Ground or USPS Priority Mail
- Availability: In stock – ships same or next business day
- Packaging: ARP branded protective box 6 x 4 x 1.5 inches
- Weight: 0.4 lbs
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