Looking for aftermarket parts to modify or upgrade your 2021 Subaru WRX STI with exhaust, mufflers & tips? At Tunersports.com we carry a huge selection of the top name brand performance exhaust, mufflers & tip parts and accessories for your WRX STI.
Whether you have a 2021 Subaru WRX STI in Base to Limited trim we have you covered. With exhaust, mufflers & tips from catback to headers & manifolds we have 20 WRX STI exhaust, mufflers & tip mods available. All parts have free shipping to the Continental US 48 States.
 IN STOCK Turbo XS Exhaust Adapters ADA-OEMDP-3CB-1Turbo XS Subaru OEM Downpipe to 3in Cat-Back Adapter w/Stainless Steel Exhaust Gasket $61.81
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 IN STOCK Turbo XS Exhaust Adapters ADA-3DP-OEMCB-1Turbo XS Subaru 3in Downpipe to OEM Cat-Back Adapter w/Stainless Steel Exhaust Gasket $80.67
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 IN STOCK Turbo XS Exhaust Adapters ADA-3DP-OEMCBTurbo XS Subaru WRX/STi 3in Downpipe to OEM Cat-Back Adapter w/Standard Exhaust Gasket $61.81
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 IN STOCK Turbo XS Exhaust Gaskets GEMH-EJ2025Turbo XS Subaru EJ20/EJ25 4-Layer Stainless Steel Exhaust Manifold to Header Gasket - Pair $41.36
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 IN STOCK Injen Catback Exhaust SES1207TTInjen 15-20 Subaru STI Cat Back Exhaust w/ Quad Titanium Tips $1,213.76
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 IN STOCK Mishimoto Cat-back Exhaust MMEXH-WRX-15Mishimoto 2015 Subaru WRX 3in Stainless Steel Cat-Back Exhaust $1,159.95
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 IN STOCK Mishimoto Exhaust Adapters MMEXH-ADAP-SDAEMishimoto Subaru Exhaust Adapter, Stock Downpipe to 3in Exhaust $72.00
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 IN STOCK Mishimoto Exhaust Adapters MMEXH-ADAP-3DSEMishimoto Subaru Exhaust Adapter 3 Downpipe to Stock Exhaust $72.00
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 IN STOCK Borla Cat Back ATAK 140595Borla 15-16 Subaru WRX / STI 2.5L S-Type Cat-Back Exhaust Quad Rd RL Tips $1,548.99
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 IN STOCK Borla Cat Back S-Type 140595CBBorla 15-19 Subaru WRX/STI 2.5L Turbo 3in S-Type Catback Exhaust - 2.5in Black Chrome Tips $1,832.99
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IN STOCK Turbo XS Exhaust Adapters ADA-3DP-OEMCB-1Turbo XS Subaru 3in Downpipe to OEM Cat-Back Adapter w/Stainless Steel Exhaust Gasket $80.67
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 IN STOCK AWE Tuning Cat-Back Touring 3015-42104AWE Tuning Subaru STI VA / WRX GV / STI GV Sedan Touring Edition Exhaust - Chrome Silver Tip (102mm) $1,445.00
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 IN STOCK AWE Tuning Cat-Back Touring 3015-43108AWE Tuning Subaru STI VA / WRX GV / STI GV Sedan Touring Edition Exhaust - Diamond Black Tip (102mm) $1,545.00
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IN STOCK Injen Catback Exhaust SES1207TTInjen 15-20 Subaru STI Cat Back Exhaust w/ Quad Titanium Tips $1,213.76
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 IN STOCK AWE Tuning Cat-Back Track 3020-42058AWE Tuning Subaru WRX/STI VA/GV Sedan Track Edition Exhaust - Chrome Silver Tips (102mm) $1,095.00
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 IN STOCK AWE Tuning Cat-Back Track 3020-43066AWE Tuning Subaru WRX/STI VA/GV Sedan Track Edition Exhaust - Diamond Black Tips (102mm) $1,195.00
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 IN STOCK AWE Tuning Exhaust Conversion Kits 3815-41006AWE Tuning 2011+ Subaru STI (GV/VA) Track-to-Touring Conversion Kit $695.00
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IN STOCK Borla Cat Back S-Type 140595CBBorla 15-19 Subaru WRX/STI 2.5L Turbo 3in S-Type Catback Exhaust - 2.5in Black Chrome Tips $1,832.99
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 IN STOCK AWE Tuning Exhaust Conversion Kits 3820-41004AWE Tuning 2015+ Subaru WRX (VA) / 2011+ Subaru STI (VA/GV) Touring-to-Track Conversion Kit $395.00
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IN STOCK Borla Cat Back ATAK 140595Borla 15-16 Subaru WRX / STI 2.5L S-Type Cat-Back Exhaust Quad Rd RL Tips $1,548.99
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