Looking for aftermarket parts to modify or upgrade your Subaru WRX STI with catback? At Tunersports.com we carry a huge selection of the top name brand performance catback parts and accessories for your WRX STI.
Whether you have a 2015 or 2021 Subaru WRX STI in Base to Type RA trim we have you covered. We have 30 catback available to mod your WRX STI. All parts have free shipping to the Continental US 48 States.
 OUT OF STOCK 49-36801-LThis Takeda dual cat-back exhaust system for the 2015 - 2017 Subaru WRX and WRX STI delivers true bolt-on performance with gains up to +14 horsepower and +22 lbs. x ft. of torque as measured on our in-house dyno. 3" into 2-1/4" mandrel-bent 304 stainless steel tubing, mitered merge and dual, stainle... aFe Takeda 3in 304 SS Cat-Back Exhaust System 15-18 Subaru WRX/WRX STI H4-2.0/2.5L (t) 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $1,652.48 SALE |
 OUT OF STOCK 49-36801-PaFe is proud to introduce an all new Takeda dual cat-back exhaust system for the 2015-2017 Subaru WRX and WRX STI with the H4-2.0L/2.5L (t) engines. This performance cat-back exhaust system is constructed out of 3" into dual 2-1/4" mandrel-bent 304 stainless steel tubing and incorporates a mitered m... aFe Takeda 3in SS Exhaust Cat-Back 15-16 Subaru WRX/STI 2.0L/2.5L Polished Tips 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $1,499.85 SALE |
 IN STOCK 3015-42104AWE Tuning Subaru STI VA / WRX GV / STI GV Sedan Touring Edition Exhaust - Chrome Silver Tip (102mm) 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $1,445.00 |
 IN STOCK 3015-43108AWE Tuning Subaru STI VA / WRX GV / STI GV Sedan Touring Edition Exhaust - Diamond Black Tip (102mm) 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $1,545.00 |
 IN STOCK 3020-42058AWE Tuning Subaru WRX/STI VA/GV Sedan Track Edition Exhaust - Chrome Silver Tips (102mm) 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $1,095.00 |
 IN STOCK 3020-43066AWE Tuning Subaru WRX/STI VA/GV Sedan Track Edition Exhaust - Diamond Black Tips (102mm) 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $1,195.00 |
 IN STOCK 3815-41006AWE Tuning 2011+ Subaru STI (GV/VA) Track-to-Touring Conversion Kit 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $695.00 |
 IN STOCK 3820-41004AWE Tuning 2015+ Subaru WRX (VA) / 2011+ Subaru STI (VA/GV) Touring-to-Track Conversion Kit 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $395.00 |
 OUT OF STOCK BXEX-51001BLOX Racing is pleased to introduce its new line of stainless steel exhaust systems.
These units are constructed from 100% T304 stainless steel. The complete system is mandrel-bent for consistency and precision, and TIG-welded to provide durability and reliability against breakage.
The system feat... BLOX Cat-Back Exhaust System T304 SS 2015+ Subaru WRX 2015-2015 Subaru WRX STI Launch Edition 2015-2020 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $1,120.00 |
 IN STOCK - LOW 140595Borla Cat-Back And Axle-Back multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive Borla Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 stainless steel, su... Borla 15-16 Subaru WRX / STI 2.5L S-Type Cat-Back Exhaust Quad Rd RL Tips 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $1,548.99 |
 IN STOCK 140595CBBORLA Cat-Back and Axle-Back multi-core technology is designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 stainle... Borla 15-19 Subaru WRX/STI 2.5L Turbo 3in S-Type Catback Exhaust - 2.5in Black Chrome Tips 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $1,832.99 |
 IN STOCK 14857CORSAs Patented Reflective Sound Cancellation® (RSC) Technology allows acoustic engineers to create a drone free exhaust sound, styled specifically to fit the personality of your vehicle. Each system is designed to increase vehicle performance, deliver an AGGRESSIVE SOUND under acceleration and a D... Corsa 2015 Subaru WRX Cat Back Exhaust, Polished Quad 3.5in Tips *Sport* 2015-2015 Subaru WRX STI Launch Edition 2015-2020 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA $1,856.99 |
 IN STOCK 14857BLKCORSAs Patented Reflective Sound Cancellation® (RSC) Technology allows acoustic engineers to create a drone free exhaust sound, styled specifically to fit the personality of your vehicle. Each system is designed to increase vehicle performance, deliver an AGGRESSIVE SOUND under acceleration and a D... Corsa 2015 Subaru WRX Cat Back Exhaust, Black Quad 3.5in Tips *Sport* 2015-2015 Subaru WRX STI Launch Edition 2015-2020 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA $1,928.99 |
 SHIPS FROM MANUFACTURER 10168408GReddy 15+ Subaru WRX/STi Revolution RS Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2020 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $570.00 |
 IN STOCK 10168202GReddy 2015 Subaru STI/WRX Sedan Supreme SP Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2020 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $1,002.38 SALE |
 IN STOCK SES1207TTThe Injen Performance Cat-Back Exhaust System for the 2015-2020 Subaru WRX and WRX STI was designed from the ground up to compliment the aggressive styling and blistering performance of these sporty sedans. Our custom dual muffler design hones the tone of the engine into an ear-pleasing symphony. Pu... Injen 15-20 Subaru STI Cat Back Exhaust w/ Quad Titanium Tips 2015-2015 Subaru WRX STI Launch Edition 2015-2021 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue 2018-2018 Subaru WRX STI Type RA 2020-2020 Subaru WRX STI S209 $1,427.95 |
 IN STOCK HS15STIDTGInvidia 15+ WRX/STi Sedan G5 Titan Titanium Cat-Back Exhaust
... Invidia 15+ WRX/STi Sedan G5 Titan Titanium Cat-Back Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2016 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $1,827.01 SALE |
 IN STOCK HS15STIGM4SSInvidia 2015+ Subaru WRX / STI Gemini/R400 Single Layer Quad Stainless Steel Tip Cat-Back Exhaust
... Invidia 2015+ Subaru WRX / STI Gemini/R400 Single Layer Quad Stainless Steel Tip Cat-Back Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2020 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $1,069.07 SALE |
 IN STOCK HS15STIGM4STInvidia 2015+ Subaru WRX / STI Gemini/R400 Single Layer Quad Titanium Tip Cat-Back Exhaust
... Invidia 2015+ Subaru WRX / STI Gemini/R400 Single Layer Quad Titanium Tip Cat-Back Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2020 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $1,136.78 SALE |
 IN STOCK HS15STIGTPFor a good balance of price and performance, Invidia offers the motorsport enthusiasts a strong line-up of Invidia N1 Exhausts. Each Invidia Exhaust is constructed with high quality SUS304 Stainless Steel, CNC-machined flanges, and manufactured with a polished finish. Each system features mandrel-... Invidia 15+ Subaru WRX/STI 4dr N1 Twin Outlet Single Layer Tip SS Cat-Back Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2016 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $785.73 SALE |
 IN STOCK HS15SW4GTPFor a good balance of price and performance, Invidia offers the motorsport enthusiasts a strong line-up of Invidia N1 Exhausts. Each Invidia Exhaust is constructed with high quality SUS304 Stainless Steel, CNC-machined flanges, and manufactured with a polished finish. Each system features mandrel-... Invidia 15+ Subaru WRX/STI Single N1 Stainless Steel Tip Cat-back Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2016 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $690.10 SALE |
 IN STOCK HS15STIGTTFor a good balance of price and performance, Invidia offers the motorsport enthusiasts a strong line-up of Invidia N1 Exhausts. Each Invidia Exhaust is constructed with high quality SUS304 Stainless Steel, CNC-machined flanges, and manufactured with a polished finish. Each system features mandrel-... Invidia 15+ Subaru WRX/STI 4dr N1 Twin Outlet Single Layer Tip Titanium Cat-Back Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2016 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $809.49 SALE |
 IN STOCK HS15SW4GTTFor a good balance of price and performance, Invidia offers the motorsport enthusiasts a strong line-up of Invidia N1 Exhausts. Each Invidia Exhaust is constructed with high quality SUS304 Stainless Steel, CNC-machined flanges, and manufactured with a polished finish. Each system features mandrel-... Invidia 15+ Subaru WRX/STI Single N1 Titanium Tip Cat-back Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2016 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $690.10 SALE |
 IN STOCK HS15SW4GSTFor a good balance of price and performance, Invidia offers the motorsport enthusiasts a strong line-up of Invidia N1 Exhausts. Each Invidia Exhaust is constructed with high quality SUS304 Stainless Steel, CNC-machined flanges, and manufactured with a polished finish. Each system features mandrel-... Invidia 15+ Subaru WRX/STI Single Racing Titanium Tip Cat-back Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2016 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $606.34 SALE |
 IN STOCK HS15STIG3SThe Invidia Q300 Exhaust features a flat bottom shaped muffler design results in improved high speed aerodynamic performance. The muffler inside contains continuous piping design and use of Advantex material that results in an excellent free-flow exhaust with optimized back pressure, giving greater ... Invidia 15+ Subaru WRX/STI 4Dr Q300 Twin Outlet Rolled Stainless Steel Quad Tip Cat-Back Exhaust 2015-2015 Subaru WRX STI Launch Edition 2015-2016 Subaru WRX STI Base / Limited 2016-2016 Subaru WRX STI Series.HyperBlue $1,069.07 SALE |