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ARP Subaru EJ20/EJ25 Head Stud Kit — Fits WRX/STI/Legacy
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ARP Subaru EJ20/EJ25 Head Stud Kit — Fits WRX/STI/Legacy
ARP

ARP Subaru EJ20/EJ25 Head Stud Kit — Fits WRX/STI/Legacy

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SKU: ARP260-4701

About ARP ARP (Automotive Racing Products) makes the strongest fasteners ...Read more

Price:
$294.04 $303.53
2940 ENTRIES10X
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

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About ARP

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Watch in action

The Ultimate Solution for Subaru EJ Engines

The Subaru EJ-series engine is legendary, but it is notorious for head gasket issues when pushed beyond stock power levels. The ARP Head Stud Kit for EJ20 and EJ25 engines is the definitive fix for keeping your cylinder heads locked down under high boost and extreme temperatures.

Engineered for Performance

  • Compatibility: Fits a wide range of EJ20 and EJ25 engines including WRX, STI, and Legacy GT
  • Material: Premium 8740 chrome moly steel for maximum tensile strength
  • Precision: Rolled threads for superior fatigue resistance
  • Installation: Stud design simplifies head placement and gasket alignment

When you increase the boost on your Subaru, you increase the cylinder pressure significantly. Stock head bolts are simply not designed to handle this extra load, leading to gasket failure and potential engine damage. ARP head studs are designed to be tightened to a specific torque, providing a much higher and more consistent clamping force than bolts. This ensures that your head gasket remains sealed, even under the most aggressive driving conditions. This kit is a staple for any serious Subaru enthusiast performing a rebuild or a power upgrade. With years of proven performance in the racing world, ARP is the brand you can trust to keep your engine together. Upgrade your Subaru's reliability with high-quality components from GGCRACING.

About ARP

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Watch in action

The Ultimate Solution for Subaru EJ Engines

The Subaru EJ-series engine is legendary, but it is notorious for head gasket issues when pushed beyond stock power levels. The ARP Head Stud Kit for EJ20 and EJ25 engines is the definitive fix for keeping your cylinder heads locked down under high boost and extreme temperatures.

Engineered for Performance

  • Compatibility: Fits a wide range of EJ20 and EJ25 engines including WRX, STI, and Legacy GT
  • Material: Premium 8740 chrome moly steel for maximum tensile strength
  • Precision: Rolled threads for superior fatigue resistance
  • Installation: Stud design simplifies head placement and gasket alignment

When you increase the boost on your Subaru, you increase the cylinder pressure significantly. Stock head bolts are simply not designed to handle this extra load, leading to gasket failure and potential engine damage. ARP head studs are designed to be tightened to a specific torque, providing a much higher and more consistent clamping force than bolts. This ensures that your head gasket remains sealed, even under the most aggressive driving conditions. This kit is a staple for any serious Subaru enthusiast performing a rebuild or a power upgrade. With years of proven performance in the racing world, ARP is the brand you can trust to keep your engine together. Upgrade your Subaru's reliability with high-quality components from GGCRACING.

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