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ARP Custom Age 625+ Head Stud Kit (Part Number: )
ARP Custom Age 625+ Head Stud Kit (Part Number: )
ARP Custom Age 625+ Head Stud Kit
Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
Write a Review | 3 Q&As
Part # 260-4704
$544.37
msrp: $1,008.08

In stock! Ships same day

Features & Product Details

RallySport Direct proudly carries some of the best automotive hardware in the industry brought to you by ARP. 

Here, you are looking at the ARP Custom Age 625+ Head Stud Kit. These head studs are ideal for those of you who are running much more boost and power over factory levels and need a strong head stud kit to keep your heads from lifting. 

DETAILS:

  • Made using newly formulated super-alloy demonstrates superior fatigue cycle life
  • High tensile strength and toughness of 260,000-280,000 psi
  • Resistance to atmospheric corrosion and oxidation
  • Includes 12 head studs
  • Includes 12 nuts
  • Includes 12 washers
  • Specifications

    Brand: ARP
    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.
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    QUESTIONS & ANSWERS

    • Q: Diameter  tabz994 months ago

      May I know what are the diameter of these studs? is it 11 or 14mm? tnx!
    • Q: Tensile Strength rating  SubZero5 years ago

      Description says typical tensile strength is 260,000-280,000 psi. Are these for people who can't sleep at night? I'm asking because with my build, I'd like to run 25-35 psi through a BW EFR 8374 and the ARP 11mm head bolts have a tensile strength to 200,000 psi and are 66-90% cheaper if these weren't on sale for $695. So I guess my question is, Do I need these?
      • 0 of 0 people found the following answer helpful

        A:  High cylinder pressures will start lifting heads on the car, so that is the reason of why people will start upgrading to these units over the standard ARP studs. Variables such as ignition advance and boost pressure will play a huge role in cylinder pressures that cause this to occur. But as a rule of thumb, we have customers who plan on running over 500WHP and/or 28PSI+ boost pressure out of a medium to large frame turbo to upgrade to these.

        Kirill C. @ RallySport Direct 5 years ago  
          
        Was this answer helpful?
    • Q: Torque Spec  Arty2025 years ago

      Factory bolts are torque to yield correct? These I assume are not torque to yield. So what torque spec do these get?
      • 0 of 0 people found the following answer helpful

        A:  The factory head bolts are torque to yield and these studs are torqued in the same sequence, but there are different steps. You will want to first clean the threads in the block and you may need a M11 X 1.25 thread chaser. You can then install the head studs hand tight in the block and set the heads in place. Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT. Then install the washers and the nuts onto the studs and tighten them hand tight. Following the manufacturers recommended torque sequence tighten the nuts in three equal steps to 100 ft lbs. The most common torque specs are first 30, then 60 and finally 100 ft lbs.

        Zach G. @ RallySport Direct 5 years ago  
          
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    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