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SKU: 400-8033 | UPC: 672036023645
ARP M8 x 1.25 x 45mm Broached Stud Kit for 2002-2007 Subaru Impreza WRX STI (16 pieces)
ARP M8 x 1.25 x 45mm Broached Stud Kit replaces factory exhaust manifold studs on 2002-2007 Subaru Impreza WRX and STI models with EJ20 and EJ25 engines. These studs provide secure clamping to eliminate leaks under high boost and heat. Built for repeated torque cycles in street and track conditions.
Key Features
- Genuine ARP fasteners: Engineered for high tensile strength and fatigue resistance in performance engines
- Broached head design: Allows easy installation and removal with standard tools without damaging threads
- Stud configuration: Minimizes cylinder head or manifold thread wear while ensuring even load distribution
- Precise threading: M8 x 1.25 pitch matches OEM specs for direct replacement on Subaru EJ turbo manifolds
- Complete 16-piece kit: Covers both exhaust manifolds with extras for maintenance or repairs
Product Notes
- Inspect manifold and block threads for damage prior to installation
- Apply ARP Ultra-Torque fastener lubricant to studs and threads for precise torque values
- Store in original packaging to protect from corrosion
Installation Notes
- Professional installation recommended.
- Torque to ARP-specified values (typically 22-25 ft-lbs dry or per lube instructions) in factory sequence
- Compatible with OEM manifolds headers and aftermarket units using M8 x 1.25 holes
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2007 | Subaru | Impreza | STI |
| 2004-2008 | Subaru | Forester | XT |
| 2005-2009 | Subaru | Legacy | GT |
| 2005-2009 | Subaru | Outback | XT |
Why Choose ARP?
- Proven in professional racing and millions of engines worldwide
- Manufactured from 8740 chrome-moly steel with 200000 psi tensile strength
- USA-made with exact tolerances for repeatable performance
Frequently Asked Questions
-
Q: Will this kit fit 2008 and newer STI models?
A: Designed for 2002-2007 EJ25 turbo models. Verify manifold stud length on 2008+ with EJ257 as some vary to 50mm. -
Q: What material and finish do these studs have?
A: Forged 8740 alloy steel with black oxide coating for corrosion resistance and consistent friction. -
Q: What is the ARP warranty and torque procedure?
A: Lifetime warranty against manufacturing defects. Follow ARP torque specs with Ultra-Torque lube and recheck after 100 miles.
Shipping & Handling
- Method: UPS Ground or USPS Priority Mail
- Availability: In stock - ships same or next business day
- Packaging: Secure plastic tray in 6 x 4 x 1 inch cardboard box
- Weight: 0.45 lbs
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