SET YOUR CAR
Buy Now, Pay Later!
FREE SHIPPING
On orders over $200
TALK TO A PARTS EXPERT
RALLYSPORT GUARANTEE
100% Money Back on Select Parts
Product images
Product Media
Cosworth Head Studs ARP 11mm (Part Number: )
Cosworth Head Studs ARP 11mm (Part Number: )
Cosworth Head Studs ARP 11mm (Part Number: )
Cosworth Head Studs ARP 11mm
Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

Features & Product Details

Essential for high performance engine builds, heavy duty head studs reduce cylinder head movement in high boost engines optimizing cylinder head to block sealing. Ultra high performance fasteners are manufactured from high tensile strength steel and come complete with nuts and washers.

Specifications

Brand: Cosworth
Head Alteration Required: No
Length: OEM Spec
Location: Head
Machining Required: No
QTY: 12
Mfgr. Warranty: No Warranty
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
Standard

PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED

REVIEWS & CUSTOMER MEDIA

1 Reviews
1 out of 5 Stars
5 Stars
(0)
4 Stars
(0)
3 Stars
(0)
2 Stars
(0)
1 Stars
(1)
Customer Photos and Videos
No user media. You can upload a photo or video of your install by posting a review.
2 of 2 people found the following review helpful
Dont waste your money 1 year ago
Travis
These are the exact same head studs as the 11mm ARP head studs for twice the price. Do yourself a favor and buy the APR ones.
  
Was this review helpful?

QUESTIONS & ANSWERS

  • Q: head stud strength  Travis1 year ago

    Whats the tensile strength rating?
    • 0 of 0 people found the following answer helpful

      A:  220,000 psi is the tensile strength rating for these studs

      Kirill C. @ Cosworth 1 year ago  
        
      Was this answer helpful?
  • Q: Machine work   philiprolle318075 years ago

    Would you have to get the heads and block machined for these or just the block
  • Q: Power?  CLAUFICAVILEZ7 years ago

    Until I can use this power?
    • 0 of 0 people found the following answer helpful

      A:  There is no power limitation needed to properly run these. These are known to help a pretty enormous amount or power prior to failure. Thank you!

      Sterling W. @ RallySport Direct 7 years ago  
        
      Was this answer helpful?
    • 0 of 0 people found the following answer helpful

      A:  The studs are capable of withstanding 600+whp levels of cylinder pressure, assuming there is no detonation. Beyond that may require custom studs in a larger diameter and a more robust sealing solution.

        
      Was this answer helpful?
  • Q: Torque Specs  1Fast05STi7 years ago

    Hi, I know these arent available right now, but I just ordered a set of these about a month ago or so and was wondering if you all would be able to provide the torque specs on these for my 05 STi (EJ25)
    • 0 of 0 people found the following answer helpful

      A:  Cosworth is usually good about including instructions with info like this with there products. So it should be no issue.

      Kirill C. @ RallySport Direct 7 years ago  
        
      Was this answer helpful?
    • 0 of 0 people found the following answer helpful

      A:  Send an email to [email protected] and we'll send you the instructions with the torque specs.

        
      Was this answer helpful?

This Part Fits

Subaru Impreza
WRX
2002 Subaru Impreza WRX
2003 Subaru Impreza WRX
2004 Subaru Impreza WRX
2005 Subaru Impreza WRX
2006 Subaru Impreza WRX
2007 Subaru Impreza WRX
WRX Hatchback
2008 Subaru Impreza WRX Hatchback
2009 Subaru Impreza WRX Hatchback
2010 Subaru Impreza WRX Hatchback
2011 Subaru Impreza WRX Hatchback
2012 Subaru Impreza WRX Hatchback
2013 Subaru Impreza WRX Hatchback
2014 Subaru Impreza WRX Hatchback
WRX Limited
2006 Subaru Impreza WRX Limited
2007 Subaru Impreza WRX Limited
WRX Limited Hatchback
2010 Subaru Impreza WRX Limited Hatchback
2011 Subaru Impreza WRX Limited Hatchback
2012 Subaru Impreza WRX Limited Hatchback
2013 Subaru Impreza WRX Limited Hatchback
2014 Subaru Impreza WRX Limited Hatchback
WRX Limited Sedan
2010 Subaru Impreza WRX Limited Sedan
2011 Subaru Impreza WRX Limited Sedan
2012 Subaru Impreza WRX Limited Sedan
2013 Subaru Impreza WRX Limited Sedan
2014 Subaru Impreza WRX Limited Sedan
WRX Premium Hatchback
2010 Subaru Impreza WRX Premium Hatchback
2011 Subaru Impreza WRX Premium Hatchback
2012 Subaru Impreza WRX Premium Hatchback
2013 Subaru Impreza WRX Premium Hatchback
2014 Subaru Impreza WRX Premium Hatchback
WRX Premium Sedan
2010 Subaru Impreza WRX Premium Sedan
2011 Subaru Impreza WRX Premium Sedan
2012 Subaru Impreza WRX Premium Sedan
2013 Subaru Impreza WRX Premium Sedan
2014 Subaru Impreza WRX Premium Sedan
WRX STI
2004 Subaru Impreza WRX STI
2005 Subaru Impreza WRX STI
2006 Subaru Impreza WRX STI
2007 Subaru Impreza WRX STI
WRX STI Hatchback
2008 Subaru Impreza WRX STI Hatchback
2009 Subaru Impreza WRX STI Hatchback
2010 Subaru Impreza WRX STI Hatchback
2011 Subaru Impreza WRX STI Hatchback
2012 Subaru Impreza WRX STI Hatchback
2013 Subaru Impreza WRX STI Hatchback
2014 Subaru Impreza WRX STI Hatchback
WRX STI Limited
2007 Subaru Impreza WRX STI Limited
WRX STI Limited Hatchback
2011 Subaru Impreza WRX STI Limited Hatchback
2012 Subaru Impreza WRX STI Limited Hatchback
2013 Subaru Impreza WRX STI Limited Hatchback
2014 Subaru Impreza WRX STI Limited Hatchback
WRX STI Limited Sedan
2011 Subaru Impreza WRX STI Limited Sedan
2012 Subaru Impreza WRX STI Limited Sedan
2013 Subaru Impreza WRX STI Limited Sedan
2014 Subaru Impreza WRX STI Limited Sedan
WRX STI Sedan
2011 Subaru Impreza WRX STI Sedan
2012 Subaru Impreza WRX STI Sedan
2013 Subaru Impreza WRX STI Sedan
2014 Subaru Impreza WRX STI Sedan
WRX STI Special Edition Hatchback
2010 Subaru Impreza WRX STI Special Edition Hatchback
WRX Sedan
2008 Subaru Impreza WRX Sedan
2009 Subaru Impreza WRX Sedan
2010 Subaru Impreza WRX Sedan
2011 Subaru Impreza WRX Sedan
2012 Subaru Impreza WRX Sedan
2013 Subaru Impreza WRX Sedan
2014 Subaru Impreza WRX Sedan
WRX TR
2006 Subaru Impreza WRX TR
2007 Subaru Impreza WRX TR