The IAG Performance Hand-Built Subaru EJ25 Closed Deck Long Block Engine 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 WRX, STI, Forester XT or Legacy GT. The Long Blocks feature a combination of our proven IAG Performance 750 Closed Deck Short Block and IAG 750 Cylinder Head packages, 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.
Product Description
**Usually Ships within 5-6 Weeks**
IAG 750 LONG BLOCK ENGINE WITH IAG 750 HEADS FOR 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
A "DROP-IN" SOLUTION
BUILT WITH 100% NEW COMPONENTS
The IAG 750 Long Block package is ideal for clients looking for an engine package to support up to 750 BHP applications. The IAG 750 long block features our 750 Closed Deck Short Block that utilizes a brand new EJ25 Subaru case that is converted to closed deck and is bored and honed to 99.75mm. The IAG 750 short block internals include IAG-Spec JE FSR 2618 forged pistons, .210" 9130 pins, IAG-Spec Tuff H-Beam connecting rods with ARP 2000 rods bolts and an OEM STI crankshaft. The block is then paired up with our IAG 750 Pocket Ported Cylinder Heads to increase flow, but maintain spool. The heads start as brand new Subaru OEM cylinder head castings that are CNC machined and resurfaced. The heads are outfitted with GSC Standard Size Valves, GSC Viton Valve Stem Seals, GSC Valve Guides, IAG Stage 1 Valve Springs with Titanium Retainers, and OEM Keepers as well as GSC Billet Stage 1 camshafts. To complete the package, we add an 11mm ARP 625+ head stud set and all required gaskets for the final valve cover-to-valve cover assembly.
LOOKING FOR 02-05 WRX OPTIONS?
The IAG 750 Long Block Engines are available in two extra configurations to support 02-05 USDM WRX owners and International clients. Simply choose the EJ20 option for the 2.0L Closed Deck version of our 750 Short Block to be included in your long block. If you'd like an EJ25 2.5L Short Block to be used in your long block then choose the "Hybrid" option and your long block will be built with our EJ25 IAG 750 Short Block and Chamber Matched S20 2.0L EJ20 Cylinder heads.
BUILT FOR THE WEEKEND RACER
The IAG 750 CNC Pocket Ported Competition Cylinder Heads are designed with the weekend racer in mind. These CNC pocket ported heads provide a significant upgrade in flow over the IAG 550 heads. These heads work great for cars with some race track duty (road, rally, auto-x, drag) and are designed to support up to 750 BHP with supporting mods. These heads include upgraded GSC Standard Size Valves, GSC Viton Valve Stem Seals, IAG Stage 1 Valve Springs with Titanium Retainers, and OEM Keepers. GSC S1 Camshafts are available with OEM valve lifter buckets. We also offer an optional chamber modification service (see below) for EJ20 heads to allow use on EJ25 short blocks.
BUILT WITH 100% NEW COMPONENTS
Each IAG 750 Cylinder Head Set starts with new OEM castings from Subaru of America. The first step is to select your Year and Model of vehicle so that we may provide you with the right castings to fit your project. Next, you'll select whether or not you want to include our optional GSC camshaft package. If selected, these heads will include new GSC S1 Camshafts and OEM Lifter Buckets for valve adjustment.
The bare castings are visually inspected and then fixtured into our in-house Centroid 5-axis CNC Machine. The Centroid CNC ports the intake and exhaust runners under the valves and blends them to the valve seat. Once the Centroid completes the port process, the heads undergo a cam clearance machining process which removes material from the lifter area where larger lift and duration cam profiles are known to contact the castings. The heads are then fixtured in our Newen Valve Guide and Seat Machine to cut all intake and exhaust seats with a multi-angle valve job that suits the flow characteristics of GSC's standard size valves. At this point, the heads' decks are resurfaced using our TS-3000 BlockMate, which cuts the aluminum to a smooth, even finish. Next, the heads are ultrasonically cleaned to remove debris and oils from the machining process. Finally, the heads are reassembled using IAG Stage 1 Single Valve Springs and Titanium Retainers along with GSC Viton stem seals.
WHAT IS A POCKET PORT?
Pocket porting is enlarging and blending the area under the valve seat. This is one of the most critical areas to get right in any porting job. Luckily, our Centroid 5 axis cylinder head porting machine gets it perfect every time. The area about 1" under the valve is enlarged and blended to ensure a smooth transition and increase power. The rest of the port is left alone because additional volume is not required at these power levels, and can even hurt velocity if there's not enough airflow.
GSC S1 CAMSHAFT AND LIFTER BUCKET PACKAGE
We selected these GSC Power-Division billet S1 camshafts for your IAG 750 Head Package. These will not drop any low end power, and will create more power and torque across the entire RPM range. These are perfect for stock frame upgraded turbos or up to higher horsepower upgrades. Along with the camshafts we'll include all new OEM valve lifter buckets and set final lash.
WHAT IS "CHAMBER MODIFICATION" & DO I NEED IT?
IAG's optional Chamber Modification Service is designed to reshape the combustion chamber of your cylinder heads to closely match the chamber of USDM STI cylinder heads to allow for use with 2.5L short blocks. This service is exclusive to USDM EJ20 2002-2005 WRX Cylinder Heads. We'll perform this service automatically if you choose the "Hybrid" option for your IAG Long Block.
IAG 750 EJ20 2.0L or EJ25 2.5L LONG BLOCK INCLUDES
IAG 750 EJ25 2.5L Closed Deck Short Block:
- Case Halves - Converted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 99.75mm.
- Pistons - IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Ring Set, .210" 9310 Steel Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)
- Connecting Rods - IAG-Spec Tuff H-Beam / ARP2000 Rod Bolts.
- Rod / Main Bearings - ACL or King Race bearings.
- Crankshaft - Standard New Subaru Nitride Treated 2017+ STI Crankshaft.
- Case / Main Bolts - Standard FHI Subaru case bolts.
or
IAG 750 EJ20 2.0L Closed Deck Short Block:
- Case Halves - Converted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 92.5mm.
- Pistons - IAG-Spec JE FSR 92.5mm 2618 Forged Pistons, Ring Set, .210" 9310 Steel Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)
- Connecting Rods - IAG-Spec H-Beam / ARP2000 Rod Bolts.
- Rod / Main Bearings - ACL or King Race bearings.
- Crankshaft - New Subaru WRX 2.0L Crankshaft with improved oil passages.
- Case / Main Bolts - Standard FHI Subaru case bolts.
IAG 750 CNC Pocket Ported Cylinder Heads:
- Heads - Brand New Subaru OEM WRX STI Cylinder Head Castings
- Machine Porting - CNC Pocket Ported
- Intake Valves - GSC 37mm (+1mm) Intake Valves
- Exhaust Valves - GSC 33mm (+1mm) Exhaust Valves
- Springs / Retainers - GSC Single Valve Springs & Titanium Retainers
- Guides - OEM Valve Guides
- Valve Seals - GSC Valve Stem Seals
- Lifters - OEM Lifter Buckets
- Camshafts - GSC Stage 1 Billet Camshafts
- Multi-Angle Valve Job
- Machined Cam Lobe Clearance
- Resurface
- Ultrasonic Cleaning
- Final Lash
Gaskets, Hardware & Accessories:
- Head Studs - ARP 625+ 11mm Set
- Head Gaskets - OEM
- Valve Cover Gaskets - OEM
- Cam Seals - OEM
- Valve Covers - OEM
- Wrist Pin Seal, Rear Main Seal & Separator Kit
- Crankshaft Woodruff Key
