Outfront Motorsports Custom ARP Head Stud Kit Subaru WRX 2002-2021 / STI 2004-2021/ BRZ / FR-S

Part #: OUT-ENG-HEADSTUDS

In conjunction with ARP, Outfront Motorsports has an exclusive design with our specs and innovative design. Look for our markings, accept no imitations.

• 2002-2018 WRX
• 2004-2021 STI
• 2005-2009 Legacy GT / Outback XT
• 2010-2012 Legacy GT
• 2004-2013 Forester XT
• 2003-2006 Baja Turbo
• 2013-2017 BRZ
• 2013-2016 FR-S

Benefits:

• 25% stronger than 625+ studs and 40% stonger than 11mm ARP 2000’s
• reduced shank diameter (allows for no head gasket modifying)
• more thread engagement in block over 11mm studs
• uses stock alignment pins without modifying case or heads
• over 200ft/lbs tested for stud “pull-out” in block
• same kit price compared to 625+ kits (requires additional block and head machining to use)
• custom large diameter hardened washers to prevent embedding into head under heavy torque values and HP levels
• Note, block machining must be performed as bare cases (can not be performed after shortblock is assembled)