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ARP Head Studs 11mm Subaru Turbo Models 2002-2014 WRX / 2004-2021 STI / 2005-2012 Legacy GT / 2004-2013 Forester XT

by ARP
SKU 260-4701
Original price $257.25 - Original price $257.25
Original price
$257.25 - $257.25
Current price $257.25

ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is placed vertically in special racks and precisely heat-treated to 200,000 psi. 

ARP studs are thread rolled after heat-treat, which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way, because it's tough on tooling, but the results are well worth the extra effort.

Customer Reviews

Based on 14 reviews
Robert Wiseman
ARP head studs

Subimods have been great. Helped with my entire build and have been right on top of it. Can’t wait to get these installed. Great product. And way bigger upgrade from the stock bolts.


Thank you for your 5 Star Review! We are glad to hear that Subimods has been a great help in your build and we are excited for you to install the ARP head studs. We agree that they are a significant upgrade from the stock bolts. Let us know if you need any assistance during the installation process. Thank you for choosing Subimods!


Fast and quick

Ordered and came on time ready for my rebuild and to install.


Thank you for taking the time to leave a 5 Star Review! We are glad to hear that the ARP Head Studs arrived quickly and were able to assist with your rebuild. ARP is one of the best options when replacing head studs! They give you peace of mind, everything stays together as it should! We appreciate your business and hope to serve you again in the future. Happy installing!


Always use ARP

The quality of this hardware is top notch and always a good idea when running higher boost.


Turbo cars are known for separating at the heads when more boost is introduced. The ARP 11mm Head studs are the best way to prevent this from happening! Thank you for your 5 Stars! Enjoy the added protection!



Very good product and gives me peace of mind throwing any boost I want to at them.


We appreciate your 5 Star Review of the ARP 11mm Head Studs! It is fantastic to hear that you consider these a very good product and that it provides you with peace of mind, allowing you to confidently apply any desired boost. ARP is absolutely one of the most well known and trusted brands on the market and your satisfaction and trust in their products is important to Subimods! Enjoy the peace of mind they provide!


Austin Narduzzi
2004 Forester XT: 2018 Ej 257 Type RA Block Install

It was a super simple install and adds peace of mind to the failure of head gaskets. IMO, it's a must for resealed or rebuilds.


Thank you for sharing your 5 Star Review of the ARP Head Studs, specifically during the Type RA Block installation in your 2004 Forester XT. We appreciate your feedback on the straightforward installation process and agree that upgrading to head studs can provide added peace of mind, especially when it comes to preventing head gasket failures. We consider it a crucial addition for resealed or rebuilt engines. If you have any further comments or questions, feel free to reach out!


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