Optimize your Subaru STI 2004-2007 engine's performance with a comprehensive range of top-quality aftermarket parts from industry-leading brands. Elevate the power and efficiency of your vehicle with ETS, HKS, Perrin, Mishimoto, AMS, Grimmspeed, Cobb, Remark, PLM, Turbosmart, IAG Performance, and more. Enhance airflow and filtration through AIR INTAKE DUCTS and COLD AIR INTAKES, while maintaining engine cleanliness with AIR OIL SEPARATORS and CATCH CANS. Experience impeccable control and responsiveness with BLOW OFF VALVES and BOOST CONTROL SOLENOID COVERS, complemented by the reliability of ENGINE MOUNTS and meticulously crafted ENGINE MANAGEMENT HARNESSES. Simplify maintenance and improve overall performance with DIPSTICKS and explore comprehensive ENGINE PACKAGE DEALS for a holistic approach to upgrading your Subaru WRX's engine. Unleash the full potential of your vehicle through precision-engineered components designed to deliver both power and durability, all meticulously designed to give your Subaru STI the edge on the road or track.
Subaru STI 2004-2007 Engine Parts
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In StockIAG 02-14 WRX/04-21 STI/05-09 LGT/04-13 FXT 1150 CNC Ported Drag Cylinder Heads Package | IAG-ENG-H115WL2
Only 1 leftRegular price $7,999.99Sale price $7,999.99 Regular priceUnit price per$7,999.99 -
In StockIAG 02-14 WRX/04-21 STI/05-09 LGT/04-13 FXT 1150 CNC Ported Drag Cylinder Heads Package | IAG-ENG-H115WL3
Only 1 leftRegular price $7,999.99Sale price $7,999.99 Regular priceUnit price per$7,999.99 -
In StockIAG 02-14 WRX/04-21 STI/04-13 FXT/05-09 LGT 550 Long Block Engine w/ IAG 550 Heads | IAG-ENG-L550N
Only 1 leftRegular price $9,999.99Sale price $9,999.99 Regular priceUnit price per$9,999.99 -
In StockIAG 550 Long Block Engine w/ IAG 550 Heads
Fits: 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
Only 1 leftRegular price $10,499.99Sale price $10,499.99 Regular priceUnit price per$9,999.99 -
Up to $500 off
In StockIAG 550 Long Block Engine w/ IAG 550 Heads
Fits: 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
Only 1 leftRegular price $10,499.99Sale price $10,499.99 Regular priceUnit price per$10,999.99 -
In StockIAG 02-14 WRX/04-21 STI/04-13 FXT/05-09 LGT 550 Long Block Engine w/ IAG 550 Heads | IAG-ENG-L550D
Only 1 leftRegular price $9,999.99Sale price $9,999.99 Regular priceUnit price per$9,999.99 -
In StockIAG 02-14 WRX/04-21 STI/04-13 FXT/05-09 LGT 550 Long Block Engine w/ IAG 550 Heads | IAG-ENG-L550SC
Only 1 leftRegular price $10,299.99Sale price $10,299.99 Regular priceUnit price per$10,299.99 -
In StockIAG 750 EJ25 Closed Deck Case - 11mm H.S.M.
Fits: WRX, STI, FXT & LGT
Only 1 leftRegular price $2,749.99Sale price $2,749.99 Regular priceUnit price per$2,749.99 -
In StockIAG 750 EJ25 Closed Deck Case - 11mm H.S.M.
Fits: WRX, STI, FXT & LGT
Only 1 leftRegular price $2,999.99Sale price $2,999.99 Regular priceUnit price per$2,999.99 -
In StockIAG 950 EJ25 Closed Deck Case - 14mm H.S.M., Fire-Lock
Fits: WRX, STI, LGT, FXT
Only 1 leftRegular price $3,099.99Sale price $3,099.99 Regular priceUnit price per$3,099.99 -
In StockIAG WRX, STI, LGT, FXT 950 EJ25 Closed Deck Case - 14mm H.S.M., Fire-Lock | IAG-ENG-C950BH
Only 1 leftRegular price $3,499.99Sale price $3,499.99 Regular priceUnit price per$3,499.99 -
In StockIAG 1150 EJ25 Closed Deck Case - 14mm H.S.M., Fire-Lock, Pinned + Line Honed, ARP Case Bolts
Fits: WRX, STI, LGT, FXT
Only 1 leftRegular price $4,449.99Sale price $4,449.99 Regular priceUnit price per$4,449.99 -
In StockIAG 1150 EJ25 Closed Deck Case - 14mm H.S.M., Fire-Lock, Pinned + Line Honed, ARP Case Bolts
Fits: WRX, STI, LGT, FXT
Only 1 leftRegular price $4,799.99Sale price $4,799.99 Regular priceUnit price per$4,799.99 -
IAG 750 EJ20 Closed Deck Case - 11mm H.S.M.
Fits: WRX, STI, FXT & LGT
Regular price $2,699.99Sale price $2,699.99 Regular priceUnit price per$2,699.99 -
IAG 750 EJ20 Closed Deck Case - 11mm H.S.M.
Fits: WRX, STI, FXT & LGT
Regular price $2,999.99Sale price $2,999.99 Regular priceUnit price per$2,999.99 -
IAG 950 EJ20 Closed Deck Case - 14mm H.S.M., Fire-Lock
Fits: WRX, STI, LGT, FXT
Regular price $3,799.99Sale price $3,799.99 Regular priceUnit price per$3,799.99
