ARP Subaru WRX EJ20 & EJ25 Head Stud Kit
Whether you're doing a complete rebuild or just standard maintenance, your vehicle requires the right engine components to keep running smoothly.
It is said that to succeed, you must identify a need and fulfill it. In the early 1970s, racing enthusiast Gary Holzapfel noticed that many of his friends' broken engines were caused by fastener failure. At the time, there were no off-the-shelf studs or bolts that could address this challenge. So, leveraging his years of experience manufacturing fasteners for a major aerospace subcontractor, Holzapfel founded ARP (Automotive Racing Products). In the years since, the company has grown from what was literally a backyard garage operation into a highly diversified manufacturer with seven facilities in Southern California, totaling over 200,000 square feet. These include forging, heat treating, machining, quality control finishing, and packaging/warehousing facilities in Santa Paula and Ventura, California.
- 2002 Subaru Impreza WRX
- 2003 Subaru Impreza WRX
- 2004 Subaru Impreza WRX
- 2004 Subaru Baja Turbo
- 2004 Subaru Impreza WRX STI (Door, HP Cylinder L, Speed)
- 2005 Subaru Legacy GT
- 2005 Subaru Impreza WRX
- 2005 Subaru Impreza WRX STI (Door, HP Cylinder L, Speed)
- 2005 Subaru Baja Turbo
- 2005 Saab 9-2X Aero
- 2006 Subaru Baja Turbo
- 2006 Subaru Impreza WRX
- 2006 Subaru Impreza WRX STI (Door, HP Cylinder L, Speed)
- 2006 Subaru Legacy GT
- 2006 Saab 9-2X Aero
- 2007 Subaru Impreza WRX STI Limited (Door, HP Cylinder L, Speed)
- 2007 Subaru Impreza WRX
- 2007 Subaru Impreza WRX STI (Door, HP Cylinder L, Speed)
- 2007 Subaru Impreza WRX TR (Door, HP Cylinder L, Speed)
- 2008 Subaru Forester Sports 2.5 XT
- 2008 Subaru Impreza WRX
- 2006 Subaru Impreza WRX TR (Door, HP Cylinder L, Speed)
- 2006 Subaru Impreza WRX Limited
- 2007 Subaru Impreza WRX Limited
- 2008 Subaru Impreza WRX STI (Door, HP Cylinder L, Speed)
- 2009 Subaru Impreza WRX
- 2009 Subaru Impreza 2.5 GT (Door, HP Cylinder L, Speed)
- 2009 Subaru Impreza WRX STI (Door, HP Cylinder L, Speed)
- 2010 Subaru Legacy 2.5GT (Door, HP Cylinder L, Speed)
- 2010 Subaru Impreza 2.5 GT
- 2010 Subaru Impreza WRX
- 2010 Subaru Impreza WRX STI (Door, HP Cylinder L, Speed)
- 2010 Subaru Impreza WRX Premium
- 2011 Subaru Impreza WRX
- 2011 Subaru Impreza WRX Premium
- 2011 Subaru Impreza WRX STI
- 2011 Subaru Legacy 2.5GT (Door, HP Cylinder L, Speed)
- 2010 Subaru Impreza WRX Limited
- 2010 Subaru Impreza WRX STI Special Edition (Door, HP Cylinder L, Speed)
- 2011 Subaru Impreza WRX Limited
- 2011 Subaru Impreza WRX STI Limited (Door, HP Cylinder L, Speed)
- 2012 Subaru Impreza WRX STI
- 2009 Subaru Impreza WRX Premium
- 2012 Subaru Impreza WRX
- 2012 Subaru Impreza WRX Limited
- 2012 Subaru Impreza WRX STI Limited (Door, HP Cylinder L, Speed)
- 2012 Subaru Impreza WRX Premium
Before You Order
〇 About Import Consumption Tax
At Shaftoya Shopping Site, we cover the import consumption tax incurred during importation, so there are no additional charges beyond the total amount paid at checkout.
〇 Confirmation of Fitment
Our entire product database is based on North American market (USDM) vehicles, so please verify whether or not the product will fit Japanese market (JDM) vehicles before ordering. (If you are unsure whether the listed product is compatible with your vehicle, please feel free to contact us. Our support team will be happy to look it up for you.)
If you place an order without confirming fitment, we cannot accept returns due to incompatibility.
Additionally, please note that even if items are sorted by selecting the year, manufacturer, and vehicle model using the tabs on our top page, this does not necessarily mean they will fit Japanese market models without modification.
All products have been translated into Japanese using translation software. As there may be confusing expressions, please contact us before ordering if you have any questions.
○ Regarding Delivery
Shipping costs are paid at the time of checkout. Estimates for shipping can be calculated automatically by entering your shipping address on the checkout page. For large items such as body parts, there may occasionally be a significant difference between the automatically calculated shipping cost and the actual cost. In such cases, we will contact you individually via email.
Basically, all products are shipped internationally from our US warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please allow plenty of time when ordering. If you are in a hurry, please contact us in advance to confirm the delivery date. Note that all products are transported by air; they are not shipped by sea.
○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
Please be aware that all products we handle are designed and manufactured outside of Japan. They are not compliant with the "Japanese Vehicle Inspection System," and we are unable to provide strength calculation documents or similar paperwork for the Japanese inspection system. Therefore, all parts are sold for the purpose of "circuit, private property, and off-road use," and installation and use are at your own risk.
○ Regarding Warranty
Please check the contents immediately upon arrival. As all products are shipped internationally from outside Japan, there may be shipping damage to the packaging or the product itself. Please understand that we will only provide returns, refunds, or replacement products if you contact us within 7 days of receipt regarding items with shipping damage, defective products, or incorrect items. Additionally, for products sold through us, warranty-related support will be provided "only through us." Please note that we do not handle support through other companies or distributors located in Japan.