IAG Performance IAG-ENG-4005W IAG 550 Long Block Engine w/ Stage 1 Heads for 08-21 STI.

IAG 550 EJ25 Long Block Engine with Stage 1 Heads: The IAG Performance Hand-Built 550 Subaru EJ25 Long Block Packages are a complete, valve cover to valve cover, crate engine. These engines offer significant ease of installation for customers seeking a complete "drop-in" engine package for their Subaru WRX, STI, Forester XT or Legacy GT. The Long Blocks feature a combination of our proven IAG Performance Short Block and Cylinder Head package, along with other race-proven components to complete the assembly. When paired with our Long Block Installation Packages, you have a true plug-and-play solution to get you back on the road, FAST! All components included are BRAND NEW and there is NEVER A CORE CHARGE required. The IAG 550 package is ideal for clients looking for a long block engine package to support up to 550 BHP applications. The IAG 550 long block features our highly popular Stage 2 short block that utilizes a brand new EJ25 Subaru case, 99.5mm IAG-Spec JE forged pistons, OEM STI Crank and IAG Spec H-Beam connecting rods. The block is then paired up with our IAG Stage 1 Cylinder Head Package which features Subaru WRX STI OEM cylinder head castings and GSC valvetrain components. To complete the package, we add an 11mm ARP 2000 head stud set and all required gaskets for the final valve cover-to-valve cover assembly. IAG's Break-in Instructions MUST be followed, and the long block must be professionally installed for the 12 month/12,000 mile workmanship warranty to be applicable.

This Part Fits:

Year	Make	Model	Submodel	Notes
2008	Subaru	Impreza	WRX STI
2009	Subaru	Impreza	WRX STI
2010	Subaru	Impreza	WRX STI
2011	Subaru	Impreza	WRX STI
2012	Subaru	Impreza	WRX STI
2013	Subaru	Impreza	WRX STI
2014	Subaru	Impreza	WRX STI
2011	Subaru	Impreza	WRX STI Limited
2012	Subaru	Impreza	WRX STI Limited
2013	Subaru	Impreza	WRX STI Limited
2014	Subaru	Impreza	WRX STI Limited
2012	Subaru	WRX	STI
2013	Subaru	WRX	STI
2014	Subaru	WRX	STI
2015	Subaru	WRX	STI
2016	Subaru	WRX	STI
2013	Subaru	WRX STI	Base
2014	Subaru	WRX STI	Base
2015	Subaru	WRX STI	Base
2016	Subaru	WRX STI	Base
2017	Subaru	WRX STI	Base
2018	Subaru	WRX STI	Base
2019	Subaru	WRX STI	Base
2020	Subaru	WRX STI	Base
2021	Subaru	WRX STI	Base
2015	Subaru	WRX STI	Limited
2016	Subaru	WRX STI	Limited
2017	Subaru	WRX STI	Limited
2018	Subaru	WRX STI	Limited
2019	Subaru	WRX STI	Limited
2020	Subaru	WRX STI	Limited
2021	Subaru	WRX STI	Limited
2017	Subaru	WRX STI	Sport
2018	Subaru	WRX STI	Sport
2019	Subaru	WRX STI	Sport
2020	Subaru	WRX STI	Sport
2018	Subaru	WRX STI	STI
2019	Subaru	WRX STI	STI
2020	Subaru	WRX STI	STI