Optimize your Subaru STI 2008-2014 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.
2008-2014 Subaru WRX STI Engine Parts
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![Invidia [08-14 WRX/ 08-21 STI] High Flow Catted Downpipe | HS08SW1DPC](//jdmuscleusa.com/cdn/shop/products/invidia-high-flow-catted-downpipe-subaru-wrx-2008-2014-sti-2008-2019-legacy-gt-2005-2009-hs08sw1dpc-front-pipes-and-downpipes-y-pipes-invidia-invhs08sw1dpc.jpg?v=1614517009&width=220)
Up to $487 off
In StockInvidia High Flow Catted Downpipe
Fits: 08-14 WRX, 08-21 STI
Regular price $903.00Sale price $903.00 Regular priceUnit price per$1,390.00 -
![GrimmSpeed OEM Downpipe to 3in Cat Back Adapter Turbo [Subaru Models, incl. 15-21 WRX/STI] | 077046](//jdmuscleusa.com/cdn/shop/products/grimmspeed-catback-adapter-stock-dp-to-aftermarket-3-in-subaru-wrx-sti-legacy-gt-forester-xt-077046-exhaust-gaskets-and-hardware-grimmspeed-grm077046.jpg?v=1614517761&width=220)
![GrimmSpeed OEM Downpipe to 3in Cat Back Adapter Turbo [Subaru Models, incl. 15-21 WRX/STI] | 077046](//jdmuscleusa.com/cdn/shop/products/grimmspeed-catback-adapter-stock-dp-to-aftermarket-3-in-subaru-wrx-sti-legacy-gt-forester-xt-077046-exhaust-gaskets-and-hardware-grimmspeed-grm077046-2.jpg?v=1614675435&width=220)
In StockGrimmSpeed OEM Downpipe to 3in Cat Back Adapter Turbo | 077046
Fits: Subaru Models, incl. 15-21 WRX/STI
Only 1 leftRegular price $90.00Sale price $90.00 Regular priceUnit price per$90.00 -
In StockGrimmSpeed Turbo to Downpipe Gasket - Subaru Turbo
Regular price $34.00Sale price $34.00 Regular priceUnit price per$34.00 -
![Perrin [02-14 WRX / 04-21 STI] Belt Cover Black - Black/Red/Neon Yellow| PSP-ENG-150](//jdmuscleusa.com/cdn/shop/products/perrin-alternator-cover-subaru-wrx-2002-2014-sti-2004-2019-blackredneon-yellow-psp-eng-150-alternator-covers-perrin-performance.jpg?v=1737769547&width=220)
![Perrin [02-14 WRX / 04-21 STI] Belt Cover Black - Black/Red/Neon Yellow| PSP-ENG-150](//jdmuscleusa.com/cdn/shop/products/perrin-alternator-cover-subaru-wrx-2002-2014-sti-2004-2019-blackredneon-yellow-psp-eng-150-alternator-covers-perrin-performance-hyper-teal-papsp-eng-150te-2.jpg?v=1737769547&width=220)
Up to $17.55 off
In StockPerrin Belt Cover Black - Black/Red/Neon Yellow
Fits: 02-14 WRX, 04-21 STI
Regular price From $89.25Sale price From $89.25 Regular priceUnit price per$105.00 -
![Tomei [08-21 WRX Sedan, 11-21 STI Sedan] Expreme Ti Titanium Catback Exhaust | TB6090-SB02C](//jdmuscleusa.com/cdn/shop/products/tomei-expreme-ti-titanium-cat-back-exhaust-subaru-wrx-2008-2020-sti-2011-2020-sedan-cat-back-exhaust-system-tomei-tb6090-sb02c.jpg?v=1614535665&width=220)
![Tomei [08-21 WRX Sedan, 11-21 STI Sedan] Expreme Ti Titanium Catback Exhaust | TB6090-SB02C](//jdmuscleusa.com/cdn/shop/files/tomei-expreme-ti-titanium-catback-exhaust-2008-2021-wrx-sedan-2011-2021-sti-sedan-tb6090-sb02c-610565_626x417_0a72f42d-23a0-4c5b-86a9-0cb0a650c3e3.jpg?v=1746823721&width=220)
Up to $129 off
In StockTomei Expreme Ti Titanium Catback Exhaust | TB6090-SB02C
Fits: 08-21 WRX Sedan, 11-21 STI Sedan
Only 4 leftRegular price $1,161.00Sale price $1,161.00 Regular priceUnit price per$1,290.00 -
![GrimmSpeed Lightweight Battery Tie Down [All Subaru Models]](//jdmuscleusa.com/cdn/shop/products/grimmspeed-lightweight-battery-tie-down-multiple-subaru-fitments-121026-battery-tie-downs-and-trays-grimmspeed-wrinkle-red-finish-121033.jpg?v=1614560912&width=220)
![GrimmSpeed Lightweight Battery Tie Down [All Subaru Models]](//jdmuscleusa.com/cdn/shop/products/grimmspeed-lightweight-battery-tie-down-multiple-subaru-fitments-121026-battery-tie-downs-and-trays-grimmspeed-2.jpg?v=1614560913&width=220)
In StockGrimmSpeed Lightweight Battery Tie Down
Fits: All Subaru Models
Regular price $60.00Sale price $60.00 Regular priceUnit price per$60.00 -
![GrimmSpeed [02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT] Uppipe to Turbo Gasket | 024001](//jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-up-pipe-to-turbo-gasket-gasket-024001-exhaust-gaskets-and-hardware-grimmspeed-grmgasket-024001.jpg?v=1614517788&width=220)
In StockGrimmSpeed Uppipe to Turbo Gasket
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT
Regular price $31.00Sale price $31.00 Regular priceUnit price per$31.00 -
![Perrin [02-07 WRX, 04-21 STI, 04-08 FXT] 2.4" Turbo Inlet Hose - Black/Red/Blue | PSP-INT-401](//jdmuscleusa.com/cdn/shop/products/perrin-24-in-turbo-inlet-subaru-subaru-wrx-2002-2014-sti-2004-2020-forester-xt-2004-2008-legacy-gt-2005-2009-psp-int-401bk-turbo-inlet-hoses-and-pipes-perrin-performance-black-papsp-int-401bk.jpg?v=1737769440&width=220)
![Perrin [02-07 WRX, 04-21 STI, 04-08 FXT] 2.4" Turbo Inlet Hose - Black/Red/Blue | PSP-INT-401](//jdmuscleusa.com/cdn/shop/files/psp-int-401rd_01x800_332061ca-fb72-4351-a345-329612bc1d26.jpg?v=1746731177&width=220)
Up to $49.95 off
In StockPerrin 2.4" Turbo Inlet Hose - Black/Red/Blue
Fits: 02-07 WRX, 04-21 STI, 04-08 FXT
Regular price $283.05Sale price $283.05 Regular priceUnit price per$333.00 -
![Koyo [08-21 WRX/STI] Radiator | VH091662](//jdmuscleusa.com/cdn/shop/products/vh091662.gif?v=1614327130&width=220)
![Koyo [08-21 WRX/STI] Radiator | VH091662](//jdmuscleusa.com/cdn/shop/products/koyo-radiator-subaru-wrx-sti-2008-2020-subaru-legacy-gt-2005-2009-manual-transmission-vh091662-radiators-koyo-cooling-koyvh091662-2.jpg?v=1614675210&width=220)
Up to $157.60 off
In StockKoyo Radiator
Fits: 08-21 WRX/STI
Regular price $408.00Sale price $408.00 Regular priceUnit price per$565.60 -
![Turbo XS [WRX/STI] OEM Downpipe to 3in Cat - Back Adapter w/Standard Exhaust Gasket | ADA - OEMDP - 3CB - JDMuscleExhaust Gaskets and HardwaretxsADA-OEMDP-3CB](//jdmuscleusa.com/cdn/shop/products/turbo-xs-wrxsti-oem-downpipe-to-3in-cat-back-adapter-wstandard-exhaust-gasket-ada-oemdp-3cb-3432239.jpg?v=1770328593&width=220)
Up to $9 offTurbo XS OEM Downpipe to 3in Cat-Back Adapter w/Standard Exhaust Gasket
Fits: WRX/STI
Regular price $30.00Sale price $30.00 Regular priceUnit price per$39.00 -
Up to $12.30 off
In StockPerrin Stiffi Battery Tie Down Red Subaru Models
Regular price $69.70Sale price $69.70 Regular priceUnit price per$82.00 -
Up to $3 off
In StockVibrant 2-Bolt High Temperature Exhaust Gasket - Universal
Regular price From $5.99Sale price From $5.99 Regular priceUnit price per$7.99 -
![Tomei [02-14 WRX, 04-21 STI, 05-09 LGT, 05-08 FXT] Unequal Length Exhaust Manifold/ Header | TB6010-SB02A](//jdmuscleusa.com/cdn/shop/products/tomei-unequal-length-exhaust-manifold-subaru-wrx-2002-2014-sti-2004-2020-exhaust-headers-and-manifolds-tomei-tb6010-sb02a.jpg?v=1614535670&width=220)
![Tomei [02-14 WRX, 04-21 STI, 05-09 LGT, 05-08 FXT] Unequal Length Exhaust Manifold/ Header | TB6010-SB02A](//jdmuscleusa.com/cdn/shop/files/tomei-unequal-length-exhaust-manifold-2002-2014-wrx-2004-2021-sti-2005-2009-lgt-2005-2008-fxt-tb6010-sb02a-724209_500x375_fdb4fc10-610a-4882-9d2d-4660ce65554e.jpg?v=1686347698&width=220)
Up to $89 off
In StockTomei Unequal Length Exhaust Manifold/ Header | TB6010-SB02A
Fits: 02-14 WRX, 04-21 STI, 05-09 LGT, 05-08 FXT
Only 4 leftRegular price $801.00Sale price $801.00 Regular priceUnit price per$890.00 -
![Perrin [02-07 WRX / 04-21] STI Recirculating Blow off Valve Red | PSP-TAC-600RD](//jdmuscleusa.com/cdn/shop/products/perrin-blow-off-valve-kit-recirc-subaru-wrx-02-07-sti-04-20-psp-tac-600rd-blow-off-valves-perrin-performance.jpg?v=1737769395&width=220)
![Perrin [02-07 WRX / 04-21] STI Recirculating Blow off Valve Red | PSP-TAC-600RD](//jdmuscleusa.com/cdn/shop/products/perrin-blow-off-valve-kit-recirc-subaru-wrx-02-07-sti-04-20-psp-tac-600rd-blow-off-valves-perrin-performance-2.jpg?v=1737769395&width=220)
Up to $41.70 off
In StockPerrin Recirculating Blow off Valve Red
Fits: 02-07 WRX, 04-21 STI
Regular price $236.30Sale price $236.30 Regular priceUnit price per$278.00 -
![Invidia [08-14 WRX, 08-21 STI] High Flow Cat w/ Extra 02 Bung Downpipe | HS08SW1DOC](//jdmuscleusa.com/cdn/shop/products/HS08SW1DOC_19b4e6d0-dee2-44d1-b6d5-bb1d139c297c.gif?v=1573673614&width=220)
![Invidia [08-14 WRX, 08-21 STI] High Flow Cat w/ Extra 02 Bung Downpipe | HS08SW1DOC](//jdmuscleusa.com/cdn/shop/products/HS08SW1DOC_2.gif?v=1573673614&width=220)
Up to $501 off
In StockInvidia High Flow Cat w/ Extra 02 Bung Downpipe
Fits: 08-14 WRX, 08-21 STI
Regular price $927.00Sale price $927.00 Regular priceUnit price per$1,428.00 -
![Invidia [08-14 WRX / 08-21 STI] Downpipe w/ High Flow Cat | HS08SW1DOCB](//jdmuscleusa.com/cdn/shop/products/hs08sw1docb.gif?v=1630007732&width=220)
Up to $501 off
In StockInvidia Downpipe w/ High Flow Cat | HS08SW1DOCB
Fits: 08-14 WRX / 08-21 STI
Regular price $927.00Sale price $927.00 Regular priceUnit price per$1,428.00
![Invidia [08-14 WRX/ 08-21 STI] High Flow Catted Downpipe | HS08SW1DPC](http://jdmuscleusa.com/cdn/shop/products/invidia-high-flow-catted-downpipe-subaru-wrx-2008-2014-sti-2008-2019-legacy-gt-2005-2009-hs08sw1dpc-front-pipes-and-downpipes-y-pipes-invidia-invhs08sw1dpc.jpg?v=1614517009&width=220)
![GrimmSpeed OEM Downpipe to 3in Cat Back Adapter Turbo [Subaru Models, incl. 15-21 WRX/STI] | 077046](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-catback-adapter-stock-dp-to-aftermarket-3-in-subaru-wrx-sti-legacy-gt-forester-xt-077046-exhaust-gaskets-and-hardware-grimmspeed-grm077046.jpg?v=1614517761&width=220)
![GrimmSpeed OEM Downpipe to 3in Cat Back Adapter Turbo [Subaru Models, incl. 15-21 WRX/STI] | 077046](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-catback-adapter-stock-dp-to-aftermarket-3-in-subaru-wrx-sti-legacy-gt-forester-xt-077046-exhaust-gaskets-and-hardware-grimmspeed-grm077046-2.jpg?v=1614675435&width=220)
![Perrin [02-14 WRX / 04-21 STI] Belt Cover Black - Black/Red/Neon Yellow| PSP-ENG-150](http://jdmuscleusa.com/cdn/shop/products/perrin-alternator-cover-subaru-wrx-2002-2014-sti-2004-2019-blackredneon-yellow-psp-eng-150-alternator-covers-perrin-performance.jpg?v=1737769547&width=220)
![Perrin [02-14 WRX / 04-21 STI] Belt Cover Black - Black/Red/Neon Yellow| PSP-ENG-150](http://jdmuscleusa.com/cdn/shop/products/perrin-alternator-cover-subaru-wrx-2002-2014-sti-2004-2019-blackredneon-yellow-psp-eng-150-alternator-covers-perrin-performance-hyper-teal-papsp-eng-150te-2.jpg?v=1737769547&width=220)
![Tomei [08-21 WRX Sedan, 11-21 STI Sedan] Expreme Ti Titanium Catback Exhaust | TB6090-SB02C](http://jdmuscleusa.com/cdn/shop/products/tomei-expreme-ti-titanium-cat-back-exhaust-subaru-wrx-2008-2020-sti-2011-2020-sedan-cat-back-exhaust-system-tomei-tb6090-sb02c.jpg?v=1614535665&width=220)
![Tomei [08-21 WRX Sedan, 11-21 STI Sedan] Expreme Ti Titanium Catback Exhaust | TB6090-SB02C](http://jdmuscleusa.com/cdn/shop/files/tomei-expreme-ti-titanium-catback-exhaust-2008-2021-wrx-sedan-2011-2021-sti-sedan-tb6090-sb02c-610565_626x417_0a72f42d-23a0-4c5b-86a9-0cb0a650c3e3.jpg?v=1746823721&width=220)
![GrimmSpeed Lightweight Battery Tie Down [All Subaru Models]](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-lightweight-battery-tie-down-multiple-subaru-fitments-121026-battery-tie-downs-and-trays-grimmspeed-wrinkle-red-finish-121033.jpg?v=1614560912&width=220)
![GrimmSpeed Lightweight Battery Tie Down [All Subaru Models]](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-lightweight-battery-tie-down-multiple-subaru-fitments-121026-battery-tie-downs-and-trays-grimmspeed-2.jpg?v=1614560913&width=220)
![GrimmSpeed [02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT] Uppipe to Turbo Gasket | 024001](http://jdmuscleusa.com/cdn/shop/products/grimmspeed-subaru-up-pipe-to-turbo-gasket-gasket-024001-exhaust-gaskets-and-hardware-grimmspeed-grmgasket-024001.jpg?v=1614517788&width=220)
![Perrin [02-07 WRX, 04-21 STI, 04-08 FXT] 2.4" Turbo Inlet Hose - Black/Red/Blue | PSP-INT-401](http://jdmuscleusa.com/cdn/shop/products/perrin-24-in-turbo-inlet-subaru-subaru-wrx-2002-2014-sti-2004-2020-forester-xt-2004-2008-legacy-gt-2005-2009-psp-int-401bk-turbo-inlet-hoses-and-pipes-perrin-performance-black-papsp-int-401bk.jpg?v=1737769440&width=220)
![Perrin [02-07 WRX, 04-21 STI, 04-08 FXT] 2.4" Turbo Inlet Hose - Black/Red/Blue | PSP-INT-401](http://jdmuscleusa.com/cdn/shop/files/psp-int-401rd_01x800_332061ca-fb72-4351-a345-329612bc1d26.jpg?v=1746731177&width=220)
![Koyo [08-21 WRX/STI] Radiator | VH091662](http://jdmuscleusa.com/cdn/shop/products/vh091662.gif?v=1614327130&width=220)
![Koyo [08-21 WRX/STI] Radiator | VH091662](http://jdmuscleusa.com/cdn/shop/products/koyo-radiator-subaru-wrx-sti-2008-2020-subaru-legacy-gt-2005-2009-manual-transmission-vh091662-radiators-koyo-cooling-koyvh091662-2.jpg?v=1614675210&width=220)
![Turbo XS [WRX/STI] OEM Downpipe to 3in Cat - Back Adapter w/Standard Exhaust Gasket | ADA - OEMDP - 3CB - JDMuscleExhaust Gaskets and HardwaretxsADA-OEMDP-3CB](http://jdmuscleusa.com/cdn/shop/products/turbo-xs-wrxsti-oem-downpipe-to-3in-cat-back-adapter-wstandard-exhaust-gasket-ada-oemdp-3cb-3432239.jpg?v=1770328593&width=220)
![Tomei [02-14 WRX, 04-21 STI, 05-09 LGT, 05-08 FXT] Unequal Length Exhaust Manifold/ Header | TB6010-SB02A](http://jdmuscleusa.com/cdn/shop/products/tomei-unequal-length-exhaust-manifold-subaru-wrx-2002-2014-sti-2004-2020-exhaust-headers-and-manifolds-tomei-tb6010-sb02a.jpg?v=1614535670&width=220)
![Tomei [02-14 WRX, 04-21 STI, 05-09 LGT, 05-08 FXT] Unequal Length Exhaust Manifold/ Header | TB6010-SB02A](http://jdmuscleusa.com/cdn/shop/files/tomei-unequal-length-exhaust-manifold-2002-2014-wrx-2004-2021-sti-2005-2009-lgt-2005-2008-fxt-tb6010-sb02a-724209_500x375_fdb4fc10-610a-4882-9d2d-4660ce65554e.jpg?v=1686347698&width=220)
![Perrin [02-07 WRX / 04-21] STI Recirculating Blow off Valve Red | PSP-TAC-600RD](http://jdmuscleusa.com/cdn/shop/products/perrin-blow-off-valve-kit-recirc-subaru-wrx-02-07-sti-04-20-psp-tac-600rd-blow-off-valves-perrin-performance.jpg?v=1737769395&width=220)
![Perrin [02-07 WRX / 04-21] STI Recirculating Blow off Valve Red | PSP-TAC-600RD](http://jdmuscleusa.com/cdn/shop/products/perrin-blow-off-valve-kit-recirc-subaru-wrx-02-07-sti-04-20-psp-tac-600rd-blow-off-valves-perrin-performance-2.jpg?v=1737769395&width=220)
![Invidia [08-14 WRX, 08-21 STI] High Flow Cat w/ Extra 02 Bung Downpipe | HS08SW1DOC](http://jdmuscleusa.com/cdn/shop/products/HS08SW1DOC_19b4e6d0-dee2-44d1-b6d5-bb1d139c297c.gif?v=1573673614&width=220)
![Invidia [08-14 WRX, 08-21 STI] High Flow Cat w/ Extra 02 Bung Downpipe | HS08SW1DOC](http://jdmuscleusa.com/cdn/shop/products/HS08SW1DOC_2.gif?v=1573673614&width=220)
![Invidia [08-14 WRX / 08-21 STI] Downpipe w/ High Flow Cat | HS08SW1DOCB](http://jdmuscleusa.com/cdn/shop/products/hs08sw1docb.gif?v=1630007732&width=220)