GSC Power-Division Stainless Steel Intake Valves +1mm

Part #: GSC 2014-8
MSRP: $136.00


   In Stock: Ships the Same Day
Return Policy | Shipping



Brand: GSC PowerDivision
Length: OEM
Location: Intake
Machining Required: Yes
Material: Stainless Steel
QTY: 8
Size: 1mm Oversized
Mfgr. Warranty: No Warranty
Return Policy:

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Subaru Impreza
WRX STI 2004,2005,2006,2007WRX STI Limited 2007WRX STI Hatchback 2008,2009,2010,2011,2012,2013,2014WRX STI Special Edition Hatchback 2010WRX STI Limited Sedan 2011,2012,2013,2014WRX STI Limited Hatchback 2011,2012,2013,2014WRX STI Sedan 2011,2012,2013,2014WRX 2002,2003,2004,2005,2006,2007WRX TR 2006,2007WRX Limited 2006,2007WRX Sedan 2008,2009,2010,2011,2012,2013,2014WRX Hatchback 2008,2009,2010,2011,2012,2013,2014WRX Premium Sedan 2010,2011,2012,2013,2014WRX Premium Hatchback 2010,2011,2012,2013,2014WRX Limited Sedan 2010,2011,2012,2013,2014WRX Limited Hatchback 2010,2011,2012,2013,2014
Subaru Legacy
GT Limited 2005,2007,2008,2009GT 2005,2006GT spec.B 2006,2007,2008,20092.5GT 2010,2011,2012
Subaru Forester
XT 2004,2005,2009XT Premium 2005,2010,2011,2012,2013XT Limited 2006,2007,2008,2009,2010Sports 2.5 XT 2008XT Touring 2011,2012,2013
Subaru Outback
XT 2005,2006XT Limited 2005,2007,2008,2009
Subaru Baja
Turbo 2004,2005,2006
Subaru WRX STI
Base 2015

When creating their new valve line they set out to create the best performance longest lasting valves available to the aftermarket. Using advanced 3D design and simulation programs they have created a stronger and higher flowing valve head design. They flow test prototype valve heads in the specific applications to make sure they have the highest flowing valve head available on the market today. With the materials used they have less valve distortion at the face than any of the tested designs. Less distortion allows or better sealing under extreme conditions and more consistent performance threw the life of the valve. GSC Power-Division's new valves are sure to become the industries standard for sport compact performance valves.

Valve Features
•Swirl polished heads for smoother air flow over the valve
•Back cut to reduce valve weight for higher rpm, higher boost pressure and allow for more aggressive cam profiles without increasing valve spring seat pressures.
•Valve stems are micropolished to allow for less oil retention on the stem which creates less drag on the stem to guide for a smoother motion.
•Fully nitrated ( this includes the 45 which increases valve life and makes a better seal at the valve seat for improved cylinder pressure) also reduces carbon buildup on the backside of the valve.
•Intake valves are a modified 21-4n stainless and Exhausts are a modified 23-8n stainless material for high heat capacity while maintaining longevity.
•Valve tips are either hardened or have a stelite wafer tip fused so that the tip is within 5 Rockwell C of the rocker or valve tappet for extended life and less wear
•Valve tip lengths. They have taken extra time to adjust tip heights on the applications to require less tipping of the valve to maintain proper tip height for proper valve train geometry, and to cut down on install times when setting valve lash.
•They have also adjusted the Keeper grove to properly balance intake and exhaust spring pressures to reduce the use of valve spring shims and maximize performance from their spring and retainer kits.
•Valves will work with an oem keeper/lock or when available their upgraded keeper/lock. It's not mandatory but it is suggested that any valve lock not be reused on performance applications due to material grooving.
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  • AnswerQ: Machining  1FASTWREX 3 years ago

    Will the heads need machining to install these valves due to the +1mm?

    • A: Well to answer my own question.....yes they require machining of the head, as so stated in the details column.

      1FASTWREX 3 years ago