GSC P-D EJ Series EJ205/EJ207/EJ258 Manganese Bronze Exhaust Valve Guide Stopper Style – Set 8

SKU: 3025-8

GSC P-D EJ Series EJ205/EJ207/EJ258 Manganese Bronze Exhaust Valve Guide Stopper Style – Set 8 Fits 1999-2015 Subaru Impreza WRX STI Saab 9-2X

GSC Power-Division 3025-8 Exhaust Valve Guides deliver manganese bronze construction in a stopper style design for EJ205 EJ207 EJ258 engines found in Subaru Impreza WRX STI models and Saab 9-2X Aero. These guides provide exact fitment and enhanced durability under high heat and rev conditions for reliable performance in tuned engines. Set of 8 covers a complete cylinder head rebuild.

Key Features

• Manganese Bronze Material: Handles exhaust side temperatures with low wear and high thermal conductivity for longer guide life in performance applications
• Stopper Style Design: Locks valve stem position precisely to prevent side loading and maintain seal integrity during extreme valve action
• Precision Machined Tolerances: ID honed to OEM specs plus for minimal friction and optimal oil flow in EJ205 EJ207 EJ258 heads
• Direct OEM Replacement: Matches factory dimensions for drop-in installation on listed Subaru and Saab models without head modifications
• Set of 8 Pieces: Full kit for one cylinder head ensuring balanced performance across all exhaust valves

Product Notes

• Inspect valve guide bores and hone to size prior to installation for best results
• Apply assembly lube to guides during install to reduce initial wear
• Packaged securely to prevent damage during transit

Installation Notes

• Professional installation recommended.
• Hone guide bores to 0.3125-0.3130 inch for proper interference fit
• Compatible with stock valve seals retainers and springs

This Part Fits

Year	Make	Model	Submodel
2005	Saab	9-2X	Aero
2009-2010	Subaru	Impreza	2.5 GT
2006-2011	Subaru	Impreza	2.5i
2010-2011	Subaru	Impreza	2.5i Premium
2012-2014	Subaru	Impreza	Base
1999-2001	Subaru	Impreza	L
2012-2014	Subaru	Impreza	Limited
1999-2004	Subaru	Impreza	Outback
2005-2011	Subaru	Impreza	Outback Sport
2012-2014	Subaru	Impreza	Premium
1999-2005	Subaru	Impreza	RS
2012-2014	Subaru	Impreza	Sport Limited
2012-2014	Subaru	Impreza	Sport Premium
2002-2004	Subaru	Impreza	TS
2002-2014	Subaru	Impreza	WRX
2006-2007,2010-2014	Subaru	Impreza	WRX Limited
2009-2014	Subaru	Impreza	WRX Premium
2004-2014	Subaru	Impreza	WRX STI
2007,2011-2014	Subaru	Impreza	WRX STI Limited
2010	Subaru	Impreza	WRX STI Special Edition
2006-2007	Subaru	Impreza	WRX TR
2015	Subaru	WRX STI	Base
2015	Subaru	WRX STI	Launch Edition
2015	Subaru	WRX STI	Limited

Why Choose GSC Power-Division?

• Proven in professional racing with Subaru WRX STI teams worldwide
• Manufactured from premium alloys for extreme heat and boost endurance
• Engineered in USA with tight tolerances for consistent valvetrain operation

Frequently Asked Questions

• Q: Does this fit my 2004 Subaru Impreza WRX STI EJ255 engine?
  A: Yes fits EJ205 EJ207 EJ258 exhaust side including EJ255 EJ257 variants in listed Impreza WRX STI models from 2004-2014
• Q: What is the material and guide length?
  A: Manganese bronze alloy with stopper style length of 1.181 inches overall for precise exhaust valve control
• Q: What warranty applies and install tips?
  A: GSC offers one year defect warranty press fit requires guide driver tool and proper honing for seal

Shipping & Handling

• Method: UPS Ground or USPS Priority
• Availability: In stock – ships same or next business day
• Packaging: Protective plastic tray in 6 x 4 x 2 inch box
• Weight: 0.8 lbs