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ARP Custom Age 625+ Head Stud Kit ( Part Number:ARP 260-4704)

ARP Custom Age 625+ Head Stud Kit - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

MODEL # ARP 260-4704
Manufacturer Part # 260-4704

$533.69

MSRP: $988.31

2-3
weeks
Ships within 2-3 weeks
Qualifies for free shipping!


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Rally Sport Stroker Kit EJ205 ( Part Number:RSD STRKR-KIT)
Rally Sport Stroker Kit EJ205
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Description

This newly formulated super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness – with complete resistance to atmospheric corrosion and oxidation. ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Best of all it is less expensive and expected to soon replace MP-35 as the material of choice in the high strength, super-alloy field. Typical tensile strength is 260,000-280,000 psi.
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Specifications


Brand: ARP
Head Alteration Required: No
Length: OEM Spec
Location: Head
Machining Required: No
Material: 8740 Chromoly Steel
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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RallySportDirect.com Reviews:

  • Q: Tensile Strength rating  SubZero 4 years ago

    Answer

    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?


    • 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. 4 years ago
  • Q: Torque Spec  Arty202 4 years ago

    Answer

    Factory bolts are torque to yield correct? These I assume are not torque to yield. So what torque spec do these get?


    • 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. 4 years ago
Subaru Impreza
WRX
2002 Subaru Impreza WRX
2003 Subaru Impreza WRX
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WRX Hatchback
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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
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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
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WRX STI
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WRX STI Hatchback
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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
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WRX TR
2006 Subaru Impreza WRX TR
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