IAG Performance - ARP 1/2" Head Stud Set

The IAG Performance 1/2 Inch Head Stud Set is manufactured by ARP and is designed for use on high horsepower Subaru EJ25 and FA20 DIT engines. Due to the larger size of the head studs, a greater load can be placed on the fasteners and in turn it aids in preventing cylinder heads from lifting in race applications. The larger size of the head studs requires the case halves to be drilled and tapped. The cylinder heads will also require drilling to accept the larger studs.

Vehicle Fitment:

• 1994-2000 Subaru WRX
• 2001-2007 Subaru WRX
• 2008-2014 Subaru WRX
• 2015-2020 Subaru WRX
• 1994-2000 Subaru STI
• 2001-2007 Subaru STI
• 2008-2014 Subaru STI
• 2015-2020 Subaru STI
• 1997-2002 Subaru Forester GT
• 2003-2008 Subaru Forester XT
• 2008-2013 Subaru Forester XT
• 1989-1993 Subaru Liberty RS
• 1993-1997 Subaru Liberty RS
• 1998-2003 Subaru Liberty B4
• 2004-2009 Subaru Liberty GT