2021 SUBARU WRX STI Air & Fuel Delivery

MotoRad Locking Fuel Caps MGC791

Fuel Tank Cap, Locking, Plastic, Black, For use on Honda®, Chevy, Mazda, Nissan, Toyota, Each

Part Number: SNN-MGC791

5.0 out of 5 stars ( 2 )

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K&N Universal Performance Air Filters RU-5163

Air Filter Element, Powersports, Round Taper, Clamp-On, Cotton Gauze, Oiled, Red, 6.50 in. OD, 5.00 in. ID, 4.13 in. Tall, Rubber Cap, Each

Part Number: KNN-RU-5163

5.0 out of 5 stars ( 3 )

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COBB Tuning SF Intake Systems for 2009-2013 FORESTER, 2008-2014 IMPREZA, 2015-2021 WRX STI - 715100-BK

Air Intake Kit, SF Intake, Black, Silicone, Cotton Gauze Filter, Gray, Subaru, Forester XT, WRX, STI, Kit

Part Number: CBT-715100-BK

5.0 out of 5 stars ( 2 )

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MotoRad OE Replacement-Type Fuel Caps MGC817

Fuel Tank Cap, OE Replacement, Plastic, Black, Each

Part Number: SNN-MGC817

3.0 out of 5 stars ( 1 )

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COBB Tuning 1050x Fuel Injectors 312150

Fuel Injector, 1050x, 1065 cc/min, Top Feed, Subaru, Gasoline, Flex, E85, Set of 4

Part Number: CBT-312150

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Injector Dynamics ID1050x Fuel Injectors 1050.34.14.15.8

5 out of 5 stars ( 4 )

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Turbosmart Kompact Plumb Back Blow-Off Valves TS-0203-1215

Blow-Off Valve, Plumb Back, Adjustable, Aluminum, Black Anodized, Subaru, Each

Part Number: TBS-TS-0203-1215

Not Yet Reviewed

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MotoRad OE Replacement-Type Fuel Caps MGC817T

Tethered Fuel Cap

Part Number: SNN-MGC817T

4.0 out of 5 stars ( 2 )

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Turbosmart Dual Port Blow-Off Valves TS-0205-1016

Blow-Off Valve, Dual Port, Adjustable, Aluminum, Black Anodized, Banking Plug and Gasket, Subaru, 2.5L, Each

Part Number: TBS-TS-0205-1016

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Turbosmart Supersonic Blow-Off Valves TS-0205-1316

Blow-Off Valve, Aluminum, Black Anodized, Supersonic, Subaru, Each

Part Number: TBS-TS-0205-1316

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Turbosmart Kompact Dual Port Blow-Off Valves TS-0203-1015

Blow-Off Valve, Kompact Dual Port, Aluminum, Black Anodized, Subaru, 2.5L, Each

Part Number: TBS-TS-0203-1015

5.0 out of 5 stars ( 1 )

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Radium Engineering - Fuel Pressure Regulators for 2015-2016 WRX, 2015-2021 WRX STI - 20-0965

Radium Engineering 08-21 Subaru WRX STi (EJ257 Only) RA-Series Fuel Pressure Regulator Kit

Part Number: RDM-20-0965

Not Yet Reviewed

Estimated Ship Date: May 8, 2026 if ordered today

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Estimated Ship Date: May 8, 2026 if ordered today

K&N Washable Lifetime Performance Air Filters for 2019-2021 WRX STI - 33-5092

Air Filter Element, Oiled, Cotton Gauze, Red, Panel, 9.06 in. Long, 8.40 in. Wide, 1.56 in. Tall, Subaru, 2.5L, Each

Part Number: KNN-33-5092

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Green Filter High Performance Factory Replacement Air Filters for 2019-2021 WRX, WRX STI - 7256

Air Filter Element, Woven Cotton, Green, Subaru, Each

Part Number: GRE-7256

Not Yet Reviewed

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Turbosmart Blow-Off Valve Gaskets for 2015-2021 WRX, WRX STI - TS-0205-3108

BOV Subaru Flange Gasket

Part Number: TBS-TS-0205-3108

Not Yet Reviewed

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COBB Tuning SF Intake Systems for 2009-2013 FORESTER, 2008-2014 IMPREZA, 2015-2021 WRX STI - 715100-BL

Air Intake Kit, SF Intake, Blue, Silicone, Cotton Gauze Filter, Gray, Subaru, Forester XT, WRX, STI, Kit

Part Number: CBT-715100-BL

Not Yet Reviewed

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COBB Tuning Redline Carbon Fiber Intake Systems for 2015-2021 WRX STI - 725350

Carbon Fiber Intake, Subaru Redline Carbon Fiber Intake 2015-2021 STI

Part Number: CBT-725350

Not Yet Reviewed

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DeatschWerks X2 Series Fuel Pump Modules 9-000-7050

Fuel Pumps, X2 Series Fuel Pump Module for 2008-21 WRX/STI, 2008-18 Forester, 2005-09 Legacy, 2008-14 Impreza

Part Number: DWK-9-000-7050

1.0 out of 5 stars ( 1 )

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COBB Tuning SF Air Boxes for 2018-2021 WRX STI - 716100

Air Filter Box, SF Intake Air Box, Aluminum, Black Powdercoated, Subaru, STI, Type RA, Kit

Part Number: CBT-716100

Not Yet Reviewed

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COBB Tuning SF Intake and Air Box Systems for 2018-2021 WRX STI - SUB00002IA

Air Intake Kit, SF Intake and Airbox System, Gray Cotton Gauze Filter, Black Silicone Tube, Subaru, 2.5L, Kit

Part Number: CBT-SUB00002IA

Not Yet Reviewed

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DeatschWerks X2 Series Fuel Pump Plumbing Kits 6-615

Fuel System Plumbing Kits, X2 Series, CPE Lined Hose, Stainless Steel, -8 AN Feed, -6 AN Return, with Pressure Regulator, Subaru, 2.5L, Kit

Part Number: DWK-6-615

Not Yet Reviewed

Estimated Ship Date: May 11, 2026 if ordered today

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Estimated Ship Date: May 11, 2026 if ordered today

Turbosmart Plumb Back Blow-Off Valves TS-0205-1215

Blow-Off Valve, Plumb Back, Adjustable, Aluminum, Blue Anodized, Subaru, 2.5L, Each

Part Number: TBS-TS-0205-1215

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Mishimoto Intercoolers for 2008-2014 IMPREZA, 2015-2021 WRX STI - MMTMIC-STI-08SLBL

Intercooler Kit

Part Number: MIO-TMISTI08SLBL

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

COBB Tuning Intercooler Hard Pipes for 2015-2021 WRX STI - 716500-C

Intercooler Pipes, Hard Pipes, Intercooler to Intake, 2.5 in. Diameter, Aluminum, Wrinkle Black, Subaru, Impreza, STI, Kit

Part Number: CBT-716500-C

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Spectra Premium Fuel Tank Straps ST532

FUEL TANK STRAP

Part Number: SGT-ST532

Not Yet Reviewed

Estimated Ship Date: May 7, 2026 if ordered today

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Estimated Ship Date: May 7, 2026 if ordered today

Turbosmart Plumb Back Blow-Off Valves TS-0205-1216

Blow-Off Valve, Plumb Back, Adjustable, Aluminum, Black Anodized, Subaru, 2.5L, Each

Part Number: TBS-TS-0205-1216

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today