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Engine Builds

Engine Builds

IAG Performance Subaru Engine Builds and Solutions

Engine Builds

Find IAG Performance Long Blocks, Short Blocks, Cylinder Heads, Internal Engine, and Assembly Parts for your Subaru in the Engine Build section of our website. Shop our selection of products and completely built engines that fit your WRX, STI, BRZ, Legacy GT, or Forester XT EJ20, EJ25, and FA20 engines.

Cylinder Heads & Parts

Cylinder Heads & Parts

Engine Assembly Parts

Engine Assembly Parts

Short Blocks & Internals

Short Blocks & Internals

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550 BHP

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IAG Performance

IAG 550 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT - 550 BHP
Availability: Usually Ships in 3 to 5 Days

$3,999.99

IAG 550 EJ25 2.5L SUBARU SHORT BLOCK window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-c96c5173-3a93-4dd2-a22b-1463d6a5535d' }) ...

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750 BHP

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IAG Performance

IAG 750 EJ20 Subaru Closed Deck Short Block For 2002-05 WRX - 750 BHP
Availability: Usually Ships in 24 to 72 Hours

$5,599.99

IAG 750 EJ20 2.0L SUBARU SHORT BLOCK window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-014fa3ed-a60a-4954-83a3-d7159ca9361e' }) ...

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750 BHP

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IAG Performance

IAG 750 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 750BHP
Availability: 750 & 750IH Usually Ships in 24 to 72 Hours

MSRP:

$5,299.99 - $5,399.99

IAG 750 EJ25 2.5L SUBARU SHORT BLOCK window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-746264b6-6afe-43ed-90c4-3430111a1dc3' }) ...

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950 BHP

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IAG Performance

IAG 950 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 950 BHP
Availability: Usually Ships in 24 to 72 Hours

$6,299.99

IAG 950 EJ25 2.5L SUBARU SHORT BLOCK { "__shgImageElements": { "uuid": "s-2b23c85b-2d6b-499b-84ba-196d50d44763" } } RACE ON SUNDAY, WORK ON MONDAY The IAG 950 Short Block is the ultimate...

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950 BHP

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IAG Performance

IAG 950 EJ25 Destroked 2.35L Closed Deck Short Block For WRX, STI, LGT, FXT - 950BHP
Availability: Usually Ships in 3 to 5 Days

$6,799.99

IAG 950 EJ25 2.35L DESTROKED CLOSED DECK SHORT BLOCK FOR WRX, STI, LGT, FXT - 950 BHP { "__shgImageV2Elements": { "uuid": "s-6d01b402-0928-4639-8a45-d9f0b1d08b45" } } THE IAG 950 EJ25 2.35L...

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1150 BHP

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IAG Performance

IAG 1150 2.5L Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 1150 BHP
Availability: Usually Ships in 24 to 72 Hours

$9,299.99

IAG 1150 EJ25 2.5L SUBARU SHORT BLOCK { "__shgImageElements": { "uuid": "s-c654e6f4-6f53-4f14-8ea4-ae528a102c9d" } } BUILT TO WITHSTAND HIGH HORSEPOWER DRAG RACING The IAG 1150 Short Block...

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1150 BHP

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IAG Performance

IAG 1150 High Compression 2.5L Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 1150 BHP
Availability: Usually Ships in 24 to 72 Hours

$9,299.99

IAG 1150 HIGH COMPRESSION 2.5L SUBARU CLOSED DECK SHORT BLOCK FOR WRX, STI, LGT, FXT - 1150 BHP { "__shgImageV2Elements": { "uuid": "s-7fcaecd8-65b6-4a9e-97ef-11436ae01911" } } THE IAG...

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1150 BHP

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IAG Performance

IAG 1150 Destroked 2.35L Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 1150 BHP
Availability: Usually Ships in 24 to 72 Hours

$10,199.99

IAG 1150 EJ25 2.35L DESTROKED SUBARU CLOSED DECK SHORT BLOCK FOR WRX, STI, LGT, FXT - 1150 BHP { "__shgImageV2Elements": { "uuid": "s-3a308b35-839d-4f77-8935-230b6ae607ce" } } THE IAG 1150...

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1150+ BHP

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IAG Performance

IAG Performance / Crest CNC Stage X 2.5L Subaru Billet Aluminum Short Block For WRX, STI, LGT, FXT
Availability: Usually Ships in 24 to 72 Hours

$17,599.99

IAG PERFORMANCE / CREST CNC 2.5L SUBARU BILLET ALUMINUM SHORT BLOCK 1150+ BHP { "__shgImageV2Elements": { "uuid": "s-0bf8bc47-fdd2-47a2-9d0e-3be356b90623" } } THE IAG PERFORMANCE / CREST...

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1000 BHP

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IAG Performance

IAG 1000 FA24 Subaru Closed Deck Short Block for 2022+ WRX - 1000 BHP
Availability: Usually Ships in 24 to 72 Hours

$6,899.99

IAG 1000 FA24 SUBARU CLOSED DECK SHORT BLOCK FOR 2022+ WRX - 1000 BHP { "__shgImageV2Elements": { "uuid": "s-b7ebe405-2b24-4c9a-aee3-847202de8897" } } THE ULTIMATE “WEEKEND RACER” ...

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600 BHP

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IAG Performance

IAG 600 FA20 DIT Subaru Short Block for 2015-21 WRX - 600 BHP
Availability: Usually Ships in 24 to 72 Hours

$5,099.99

IAG 600 FA20 DIT 2.0L SUBARU SHORT BLOCK { "__shgImageElements": { "uuid": "s-bf1fb559-df2c-4799-a256-8799dfda2f3d" } } DESIGNED FOR STRENGTH The IAG 600 Short Block is designed for stock...

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600 BHP

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IAG Performance

IAG 600 FA20 Short Block For 2013-20 BRZ / FR-S / GT-86 (Standard Compression 12.5:1) - 600 BHP
Availability: Usually Ships in 24 to 72 Hours

$5,099.99

IAG 600 FA20 FT86/BRZ 2.0L SUBARU SHORT BLOCK WITH 12.5:1 STANDARD COMPRESSION window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid:...

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600 BHP

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IAG Performance

IAG 600 FA20 Subaru Short Block for 2013-20 BRZ / FR-S / GT86 (10.5:1 Compression Ratio) - 600 BHP
Availability: Usually Ships in 24 to 72 Hours

$5,099.99

IAG 600 FA20 FT86/BRZ 2.0L SUBARU SHORT BLOCK WITH 10.5:1 LOW COMPRESSION window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid:...

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800 BHP

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IAG Performance

IAG 800 FA20 DIT Subaru Closed Deck Short Block for 2015-21 WRX - 800 BHP
Availability: Usually Ships in 2 to 3 Weeks

$6,299.99

IAG 800 FA20 DIT 2.0L SUBARU SHORT BLOCK { "__shgImageElements": { "uuid": "s-e2f1652a-a386-436b-8a68-8e48d60baf9d" } } GET MORE OUT OF YOUR FA20 WRX The IAG 800 Short Block is designed for...

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800 BHP

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IAG Performance

IAG 800 FA20 Subaru Closed Deck Short Block for 2013-20 BRZ / FR-S / GT86 (12.5:1 Compression Ratio) - 800 BHP
Availability: Usually Ships in 2 to 3 Weeks

$6,299.99

IAG 800 FA20 FT86/BRZ 2.0L SUBARU SHORT BLOCK WITH 12.5:1 STANDARD COMPRESSION window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid:...

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800 BHP

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IAG Performance

IAG 800 FA20 Subaru Closed Deck Short Block for 2013-20 BRZ / FR-S / GT86 (10.5:1 Compression Ratio) - 800 BHP
Availability: Usually Ships in 2 to 3 Weeks

$6,299.99

IAG 800 FA20 FT86/BRZ 2.0L SUBARU SHORT BLOCK WITH 10.5:1 LOW COMPRESSION window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid:...

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IAG Performance

IAG 550 Long Block Engine w/ IAG 550 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
Availability: Usually Ships in 1 to 2 Weeks

MSRP:

$9,799.99 - $9,999.99

IAG 550 LONG BLOCK ENGINE WITH IAG 550 HEADS FOR 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid:...

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IAG Performance

IAG 750 Closed Deck Long Block Engine w/ IAG 750 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
Availability: Usually Ships in 8 to 9 Weeks

MSRP:

$12,499.99 - $12,699.99

IAG 750 LONG BLOCK ENGINE WITH IAG 750 HEADS FOR 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid:...

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IAG Performance

IAG 950 2.35L Destroked Long Block Engine w/ IAG 950 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
Availability: Usually Ships in 8 to 9 Weeks

MSRP:

$14,199.99 - $14,399.99

IAG 950 2.35L DESTROKED LONG BLOCK ENGINE W/ IAG 950 HEADS { "__shgImageV2Elements": { "uuid": "s-1587427b-883c-44e9-bc50-b810b28d61a6" } } DROP IN AND DRIVE The IAG Performance hand-built...

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IAG Performance

IAG 950 Closed Deck Long Block Engine w/ IAG 950 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
Availability: Usually Ships in 8 to 9 Weeks

MSRP:

$13,699.99 - $13,899.99

IAG 950 LONG BLOCK ENGINE WITH IAG 950 HEADS FOR 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT { "__shgImageElements": { "uuid": "s-2c77a939-aba7-44f6-8418-1aa2700e73e9" } } A "DROP-IN" SOLUTION The...

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IAG Performance

IAG 1150 2.35L Destroked Long Block Engine w/ IAG 1150 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
Availability: Usually Ships in 8 to 9 Weeks

MSRP:

$18,699.99 - $18,899.99

IAG 1150 2.35L DESTROKED LONG BLOCK ENGINE W/ IAG 1150 HEADS { "__shgImageV2Elements": { "uuid": "s-06c34912-0134-423e-a399-5be493b7446d" } } DROP IN AND DRIVE The IAG Performance hand-built...

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IAG Performance

IAG 1150 Closed Deck Long Block Engine w/ IAG 1150 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
Availability: Usually Ships in 8 to 9 Weeks

MSRP:

$18,199.99 - $18,399.99

IAG 1150 LONG BLOCK ENGINE WITH IAG 1150 HEADS FOR 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT { "__shgImageElements": { "uuid": "s-09faa8df-c8af-47f8-961e-774ecfe3108c" } } A "DROP-IN" SOLUTION The...

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IAG Performance

IAG 800 FA20 DIT Closed Deck Long Block Engine w/ IAG 800 Heads for 2015-21 Subaru WRX
Availability: Usually Ships in 8 to 9 Weeks

$18,499.99

IAG 800 FA20F DIT TIMED LONG BLOCK FOR 2015-2021 WRX { "__shgImageElements": { "uuid": "s-fc99c78b-7adf-4bf2-84a5-4597e22c2f1d" } } A "DROP-IN" SOLUTION The IAG Performance Hand-Built 800 Subaru...

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IAG Performance

IAG 600 FA20 DIT Long Block Engine w/ IAG 600 Heads for 2015-21 Subaru WRX
Availability: Usually Ships in 8 to 9 Weeks

$15,999.99

IAG 600 FA20F DIT TIMED LONG BLOCK FOR 2015-2021 WRX { "__shgImageElements": { "uuid": "s-7cd00acd-7460-4a9a-bec2-af4f062684fc" } } A "DROP-IN" SOLUTION The IAG Performance...

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IAG Performance

IAG Timed Long Block Component Packages For Subaru WRX, STI, LGT, FXT
Availability: Usually Ships in 5 to 7 Days

MSRP:

$2,699.99 - $3,399.99

IAG TIMED LONG BLOCK COMPONENT PACKAGES FOR SUBARU EJ20/EJ25 { "__shgImageV2Elements": { "uuid": "s-dac50a45-1c75-4a33-ac95-9199d4ed7b87" } } COMPLETE TIMING COMPONENTS PACKAGE ...

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IAG Performance

IAG Timed Long Block Install Kits For Subaru EJ25 Engines
Availability: Usually Ships in 5 to 7 Days

MSRP:

$1,199.99 - $1,399.99

IAG TIMED LONG BLOCK INSTALL KITS FOR SUBARU EJ ENGINES { "__shgImageV2Elements": { "uuid": "s-6a0210e8-5792-4958-8591-bde37820cc1e" } } COMPLETE INSTALLATION KIT The IAG Timed Long...

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IAG Performance

IAG Fire-Lock 2.4L FA24 Head Gaskets (1 Pair w/ Fire-Lock Rings) For 14mm Head Studs Only
Availability: Usually Ships in 24 to 72 Hours

$299.99

IAG FIRE-LOCK 2.4L SUBARU FA24 HEAD GASKETS { "__shgImageV2Elements": { "uuid": "s-3ff14dd3-7c6b-40f2-9c24-c9ec90361927" } } HIGH HORSEPOWER & HIGH BOOST Our proprietary "Fire-Lock" Head...

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IAG Performance

IAG Fire-Lock 2.5L Subaru Head Gaskets (1 Pair w/ Fire-Lock Rings) for EJ25 / EJ257, 100mm, .051", for 14mm Head Studs
Availability: Usually Ships in 24 to 72 Hours

$299.99

IAG FIRE-LOCK 2.5L SUBARU EJ25 HEAD GASKETS { "__shgImageElements": { "uuid": "s-4a0223c6-24ac-4678-abcf-c1f968580b14" } } HIGH HORSEPOWER & HIGH BOOST Our proprietary "Fire-Lock™" Head...

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IAG Performance

IAG Fire-Lock 2.0L Head Gaskets (1 Pair w/ Fire-Lock Rings) Subaru EJ20, 93.5mm, .051", for 14mm Head Studs Only
Availability: Usually Ships in 24 to 72 Hours

$299.99

The IAG Performance Fire-Lock head gasket solution was created after years of research and development testing to prevent head gasket failure on high horsepower and high boost Subaru EJ Series engines. This solution is loosely derived from diesel...

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IAG Performance

IAG Short Block Copper O-Ring Wire & Install Tool Kit
Availability: Usually Ships in 24 to 72 Hours

$24.99

The IAG Copper O-Ring Wire & Install Tool Kit is intended for use with our case halves or short blocks. The kit includes (4) lengths of copper o-ring wire and a wooden tool handle end intended to press the o-ring wire into the machined groove without...

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