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IAG 500 EJ25 Long Block Engine w/ Stage 1 Heads - Subaru STI 2008 - 2020
IAG 500 EJ25 Long Block Engine w/ Stage 1 Heads - Subaru STI 2008 - 2020
IAG 500 EJ25 Long Block Engine w/ Stage 1 Heads - Subaru STI 2008 - 2020

IAG 500 EJ25 Long Block Engine w/ Stage 1 Heads

Subaru STI 2008 - 2020

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Part # IAG-ENG-4000W
$8,499.99

Product will ship from manufacturer, average time to ship: 30 business days
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Features & Product Details

RallySport Direct now carries highly sought-after high-performance upgrades and accessories brought to you by IAG Performance. 

On this page, you are looking at the IAG 500 Long Block. This package is a complete, valve cover to valve cover, crate engine. It is the perfrect option for ease of installation and gives you a premier "drop in" engine. This kit will support up to 500BHP applications. IAG's break-in instructions MUST be followed and the package must be professionally installed for the 12 month / 12k mile warranty to be applicable. All IAG Short Blocks are balanced and blueprinted.

Here is what the package contains:

Stage 1 Short Block:

  • Case Halves - Brand new Subaru OEM case halves 99.5mm Stock Bore
  • Pistons - IAG-Spec JE 99.5mm Forged Pistons, Ring Set, .180" Chromoly Steel Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pin)
  • Connecting Rods - Early OEM (Stronger Style) STI rods
  • Rod / Main Bearings - ACL or King Bearings
  • Crankshaft - Standard New Subaru Nitride Treated 2017+ STI Crankshaft
  • Case / Main Bolts - Standard FHI Subaru case bolts

  • Stage 1 Heads:
  • Heads - Brand New Subaru OEM WRX STI Cylinder Head Castings
  • Intake Valves - GSC 36mm (Standard) Intake Valves
  • Exhaust Valves - GSC 32mm (Standard) 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 2000 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
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