Engine - Engine Builds - Page 1

Engine Builds

IAG Performance carries oem replacement and high-performance engine building parts for your 2002-2023 Subaru WRX, STI, Legacy GT, Forester XT, and BRZ. We have all the parts you need for your Subaru such as Short blocks, Longs Blocks, Pistons, Cranks, Rods, Cases, Cylinder Heads, Camshafts, Sprockets, Pulleys, Gaskets, Timing Belts, Hardware, and more.

Here are just a few of the brands we carry-
ACL, ARP, ATI, Brian Crower, CP Pistons, Carrillo, Clevite, Fluidampr, GSC, Gates, HKS, IAG Performance, JE Pistons, JE Pro Seal, Kelford Cams, King Engine Bearings, Manley, Perrin, Radium Engineering, Subaru, Tomei, and more.

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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 24 to 72 Hours

$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 2 to 3 Weeks

$4,999.99

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 Usually Ships in 24-72 Hours / 750IH in 1-2 Weeks

MSRP:

$4,999.99 - $5,099.99

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

$5,999.99

IAG 950 EJ25 2.5L SUBARU SHORT BLOCK window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-2b23c85b-2d6b-499b-84ba-196d50d44763' }) ...

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950 BHP

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IAG Performance

IAG 950 EJ20 Subaru Closed Deck Short Block For 2002-05 WRX - 950 BHP
Availability: Usually Ships in 24 to 72 Hours

$5,999.99

IAG 950 EJ20 2.0L SUBARU SHORT BLOCK window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-027d1542-8393-4f80-a7c7-a9031042cf80' }) ...

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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

$8,999.99

IAG 1150 EJ25 2.5L SUBARU SHORT BLOCK window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-c654e6f4-6f53-4f14-8ea4-ae528a102c9d' }) ...

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1100+ 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 6+ Months

$17,599.99

IAG / Crest CNC Stage X Billet Aluminum EJ25 Subaru Short Block The CNC Billet Aluminum EJ case seeks to change the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness that exists in max-power builds. Each IAG /...

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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 1 to 2 Weeks

$4,799.99

IAG 600 FA20 DIT 2.0L SUBARU SHORT BLOCK window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-bf1fb559-df2c-4799-a256-8799dfda2f3d' }) ...

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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 1 to 2 Weeks

$4,799.99

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 1 to 2 Weeks

$4,799.99

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 1 to 2 Weeks

$5,999.99

IAG 800 FA20 DIT 2.0L SUBARU SHORT BLOCK window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-e2f1652a-a386-436b-8a68-8e48d60baf9d' }) ...

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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 1 to 2 Weeks

$5,999.99

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 1 to 2 Weeks

$5,999.99

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:

$9,499.99 - $9,699.99

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 3 to 4 Weeks

MSRP:

$11,799.99 - $11,999.99

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 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 3 to 4 Weeks

MSRP:

$12,999.99 - $13,199.99

IAG 950 LONG BLOCK ENGINE WITH IAG 950 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 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 3 to 4 Weeks

MSRP:

$17,499.99 - $17,699.99

IAG 1150 LONG BLOCK ENGINE WITH IAG 1150 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 800 FA20 DIT Closed Deck Long Block Engine w/ IAG 800 Heads for 2015-21 Subaru WRX
Availability: Usually Ships in 3 to 4 Weeks

$16,999.99

IAG 800 FA20F DIT TIMED LONG BLOCK FOR 2015-2021 WRX window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-fc99c78b-7adf-4bf2-84a5-4597e22c2f1d' }) ...

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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 3 to 4 Weeks

$14,499.99

IAG 600 FA20F DIT TIMED LONG BLOCK FOR 2015-2021 WRX window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid:...

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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 window.SHOGUN_IMAGE_V2_ELEMENTS = window.SHOGUN_IMAGE_V2_ELEMENTS || new Array(); window.SHOGUN_IMAGE_V2_ELEMENTS.push({ uuid:...

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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 window.SHOGUN_IMAGE_V2_ELEMENTS = window.SHOGUN_IMAGE_V2_ELEMENTS || new Array(); window.SHOGUN_IMAGE_V2_ELEMENTS.push({ uuid:...

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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 window.SHOGUN_IMAGE_ELEMENTS = window.SHOGUN_IMAGE_ELEMENTS || new Array(); window.SHOGUN_IMAGE_ELEMENTS.push({ uuid: 's-4a0223c6-24ac-4678-abcf-c1f968580b14' }) HIGH...

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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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IAG Performance

IAG Performance ARP 1/2" Head Stud Set for Subaru EJ25, FA20, and FA20 DIT
Availability: Usually Ships in 24 to 72 Hours

$524.99

The IAG Performance 1/2 Inch Head Stud Set is manufactured by ARP and is designed for use on high horsepower Subaru EJ25, FA20, and FA20 DIT engines. Due to the larger size of the head studs, a greater load can be placed on the fasteners and in turn it...

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IAG Performance

IAG Performance / ARP 14mm Head Stud Set For Subaru WRX, STI, Legacy GT, Forester XT
Availability: Usually Ships in 24 to 72 Hours

$579.99

IAG's / ARP 14mm Head Stud Set is designed for use on high horsepower Subaru engines. The larger size of the stud increases its load capacity which in turn helps to prevent the cylinder head from lifting and creating head gasket failures. The oversized...

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IAG Performance

IAG Wrist Pin / Cover Seal Kit for Subaru EJ25 Short Blocks
Availability: Usually Ships in 24 to 72 Hours

$125.99

Not planning on reusing your original short block service plugs and covers? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal, (3) OEM wrist pin plugs, (3) OEM wrist pin plug washers, (1) OEM separator cover, (6) OEM...

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IAG Performance

IAG Short Block Plug & Rear Main Seal Kit for Subaru 2015-21 WRX FA20 DIT
Availability: Usually Ships in 24 to 72 Hours

$52.99

Not planning on reusing your original short block oil plugs? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal and (3) OEM Oil Plugs. * Never reuse a rear main seal on a new short block.* Please note all IAG FA20 DIT...

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IAG Performance

IAG Short Block Subaru BRZ FA20 Plug & Rear Main Seal Kit
Availability: Usually Ships in 24 to 72 Hours

$52.99

Not planning on reusing your original short block oil plugs? IAG offers a simple comprehensive cover and seal kit that includes (1) Rear main seal and (2) OEM Oil Plugs. * Never reuse a rear main seal on a new short block. * Please note all IAG FA20...

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IAG Performance

IAG Performance 14mm Head Stud Dowel (Sold Individually)
Availability: Usually Ships in 24 to 72 Hours

$10.99

The IAG Performance 14mm Head Stud Dowel is specifically designed to work our 14mm ARP head studs and machined cases. Subaru short blocks or cases that are machined for 14mm head studs will require (x2) dowels per side or (x4) dowels total. Dowels are...

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