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Sustainable Iag 750 Closed Deck Long Block Engine W/ Iag 750 Heads For 2008-18 Sti With Warranty [LONMFJ2c]

$124.99 $399.99 -69%

The IAG Performance Hand-Built Subaru EJ25 Closed Deck Long Block Engine Packages are a complete, valve cover to valve cover, crate engine. The Long Blocks feature a combination of our proven IAG Performance 750 Closed Deck Short Block and IAG 750 Cy

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Sustainable Iag 750 Closed Deck Long Block Engine W/ Iag 750 Heads For 2008-18 Sti With Warranty [LONMFJ2c]

The IAG Performance Hand-Built Subaru EJ25 Closed Deck Long Block Engine Packages are a complete, valve cover to valve cover, crate engine. 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. 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. IAG's Standard Long Block Workmanship Warranty covers your long block for 12 months or 12,000 miles. We have also teamed up with IAG Certified Installation Facilities which offer a 24 month/24,000 mile workmanship warranty when the engine is purchased, installed, and tuned by that IAG Certified Installer.
  • 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.
Vehicle Specific
  • Subaru: Impreza 2008 - 2014 Subaru: WRX STI 2013 - 2018

Attributes:

  • Brand Name: IAG Performance
  • GTIN: 00887753904904
  • Assembled: Yes
  • Assembly Lubricant Included: No
  • Bore Diameter: 99.75
  • CNC-Machined Combustion Chamber: Yes
  • CNC-Machined Exhaust Runner: Yes
  • CNC-Machined Intake Runner: Yes
  • Connecting Rod Beam Style: H Beam
  • Connecting Rod Material: Forged Steel
  • Crankshaft Material: Aluminum
  • Cylinder Head Material: Aluminum
  • Engine Block Material: Aluminum
  • Engine Oil Pump Included: No
  • Engine Water Pump Included: No
  • Exhaust Valve Diameter: 32
  • Exhaust Valve Length: 104.37
  • Exhaust Valve Material: Stainless Steel
  • Exhaust Valve Stem Diameter: 6
  • Flexplate Included: No
  • Flywheel Included: No
  • Fuel Injectors Included: No
  • Fuel Type: All
  • Grade Type: Performance
  • Intake Valve Length: 104.40
  • Intake Valve Material: Stainless Steel
  • Intake Valve Stem Diameter: 6
  • Oil Pan Included: No
  • Piston Material: Aluminum
  • Piston Rings Included: Yes
  • Piston Style: Dome
  • Power Rating: 750 BHP
  • Timing Cover Included: No
  • Timing Set Included: No
  • Valve Covers Included: Yes
  • Valve Seal Material: Viton
  • Valve Seals Included: Yes
  • Valve Spring Retainer Material: Titanium
  • Valve Springs Included: Yes
  • Valves Included: Yes
  • Windage Tray Included: No
  • Wrist Pin Style: Full Floating

Extended Information:

  • Country of Origin: US
  • Emissions : Emissions Compliance Exempt
  • Life Cycle Status: Available To Order

Packing Information:

  • Quantity of Each: 1
  • Package UOM: EA
  • Dimension: 46 x 32 x 28 inches
  • Weight: 285 POUNDS

PDF:

What Our Customers Say

January 22, 2026

Absolutely no complaints!

The engineering is truly masterful.

- Milo U..

January 22, 2026

Absolutely no complaints!

This is an awesomely well-made product.

- Tammy J..

January 22, 2026

Absolutely no complaints!

This product is a real standout item.

- Grace G..

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