Looking for aftermarket parts to modify or upgrade your Audi S3 with catback? At Tunersports.com we carry a huge selection of the top name brand performance catback parts and accessories.

IN STOCK - DROPSHIPS 49-36442-BThis MACH Force-Xp exhaust system is constructed of mandrel-bent stainless steel tubing for maximum strength and durability. Featuring a high-flow stainless steel muffler that produces a deepened tone, this system is guaranteed to gain attention. Due to the state-of-the-art computer-aided technology... aFe MACHForce XP 3in-2.5in 304SS Exhaust Cat-Back 15-20 Audi S3 L4-2.0L (t) - Black Tips 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $1,684.00 |
OUT OF STOCK 49-36442-CThis MACH Force-Xp exhaust system is constructed of mandrel-bent stainless steel tubing for maximum strength and durability. Featuring a high-flow stainless steel muffler that produces a deepened tone, this system is guaranteed to gain attention. Due to the state-of-the-art computer-aided technology... aFe MACHForce XP 3in-2.5in 304SS Exhaust Cat-Back 15-20 Audi S3 L4-2.0L (t) - Carbon Tips 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $1,684.00 |
IN STOCK - DROPSHIPS 49-36442-PThis MACH Force-Xp exhaust system is constructed of mandrel-bent stainless steel tubing for maximum strength and durability. Featuring a high-flow stainless steel muffler that produces a deepened tone, this system is guaranteed to gain attention. Due to the state-of-the-art computer-aided technology... aFe MACHForce XP 3in-2.5in 304SS Exhaust Cat-Back 15-20 Audi S3 L4-2.0L (t) - Polished Tips 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $1,606.00 |

OUT OF STOCK S-AU/TI/17HThis system is constructed using lightweight race-proven materials, titanium for the muffler and link pipe section, and carbon fibre for two sets of newly designed, hand-crafted tailpipes, delivering a result that is over 41% lighter in comparison to the standard stock system. The Evolution Line (T... Akrapovic 2021+ Audi S3 Sportback (8Y) Evolution Line Cat Back (Titanium) w/Carbon Tips 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $6,086.23 |

IN STOCK - LOW 3025-42068Smooth bends, tight packaging, and two attitudes. The SwitchPath™ Exhaust is comprised of handcrafted 3-inch and 2.5-inch U.S.-sourced T304L stainless steel with a valved passenger-side tip outlet. SwitchPath™ retains the factory valve behavior, and obeys the S3’s ECU commands based on throttl... AWE Tuning Audi 8V S3 SwitchPath Exhaust w/Chrome Silver Tips 102mm 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $2,255.00 |
OUT OF STOCK 3025-43072Smooth bends, tight packaging, and two attitudes. The SwitchPath™ Exhaust is comprised of handcrafted 3-inch and 2.5-inch U.S.-sourced T304L stainless steel with a valved passenger-side tip outlet. SwitchPath™ retains the factory valve behavior, and obeys the S3’s ECU commands based on throttl... AWE Tuning Audi 8V S3 SwitchPath Exhaust w/Diamond Black Tips 102mm 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $2,355.00 |

IN STOCK - LOW 3015-42897Introducing the first AWE Exhaust for the Audi S3 to ever feature patented drone-canceling 180 Technology®. The Touring Edition features a 3” inlet complete with an adapter to accommodate the factory downpipe perfectly while leaving an open 3” connection. In the rear resides AWE’s patented 18... AWE 22-24 Audi 8Y S3 Touring Edition Exhaust - Chrome Silver Tips 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $1,485.00 |
OUT OF STOCK 3015-43897Introducing the first AWE Exhaust for the Audi S3 to ever feature patented drone-canceling 180 Technology®. The Touring Edition features a 3” inlet complete with an adapter to accommodate the factory downpipe perfectly while leaving an open 3” connection. In the rear resides AWE’s patented 18... AWE 22-24 Audi 8Y S3 Touring Edition Exhaust - Diamond Black Tips 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $1,485.00 |

IN STOCK 3015-42142For those who like it raw, rowdy, and light, the AWE Track Edition is for you. The Track Edition takes all of the precision engineering and performance of its SwitchPath™ counterpart, minus the valve on the passenger’s side and the muffler on the driver’s side. The result is a constant “valv... AWE Tuning Audi 8V S3 Track Edition Exhaust w/Chrome Silver Tips 102mm 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $1,435.00 |
IN STOCK 3015-43150For those who like it raw, rowdy, and light, the AWE Track Edition is for you. The Track Edition takes all of the precision engineering and performance of its SwitchPath™ counterpart, minus the valve on the passenger’s side and the muffler on the driver’s side. The result is a constant “valv... AWE Tuning Audi 8V S3 Track Edition Exhaust w/Diamond Black Tips 102mm 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $1,485.00 |
IN STOCK - LOW 3020-42897The Track Edition features a 3” inlet complete with an adapter to accommodate the factory downpipe perfectly while leaving an open 3” connection. Featuring minimal filter with one bullet resonator in the center, the Track Edition provides a full-bodied soundtrack at all times.. This configuratio... AWE 22-24 Audi 8Y S3 Track Edition Exhaust - Chrome Silver Tips 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $1,225.00 |
IN STOCK - LOW 3020-43897The Track Edition features a 3” inlet complete with an adapter to accommodate the factory downpipe perfectly while leaving an open 3” connection. Featuring minimal filter with one bullet resonator in the center, the Track Edition provides a full-bodied soundtrack at all times.. This configuratio... AWE 22-24 Audi 8Y S3 Track Edition Exhaust - Diamond Black Tips 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $1,225.00 |

OUT OF STOCK 3815-11897AWE 22-24 Audi 8Y S3 Track-to-Touring Conversion Kit 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $645.00 |
IN STOCK 3820-11050If you're looking to have it cranked to 11 at all times, this is for you. The AWE SwitchPath™-to-Track Conversion kit replaces the rear muffler and valve section sections with straight-through, unfiltered Track Edition rear sections.... AWE Tuning Audi 8V S3 SwitchPath-to-Track Conversion Kit 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $225.00 CLEARANCE VIEW PRICE IN CART |
OUT OF STOCK 3820-11897Converts existing AWE Touring Edition Exhausts into an AWE Track Edition Exhaust.... AWE 22-24 Audi 8Y S3 Touring-to-Track Conversion Kit 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $405.00 |
OUT OF STOCK 3825-11030Take control of your car by swapping the rear Track Edition straight-sections for a bespoke muffler on the driver's side and a valves straight section on the passenger's side. Factory valve behavior is retained and controlled via driving modes. For complete control over your exhaust valve, we recomm... AWE Tuning Audi 8V S3 Track-to-SwitchPath Exhaust Conversion Kit 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $1,075.00 |

IN STOCK - LOW 140631Borla Cat-Back and Rear Section exhaust systems feature patented straight through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power; driving excitement; fuel economy; and the distinctive Borla Sound of power respected enthusiasts everywhere. Each system i... Borla 13-15 Audi S3 S-Type Dual Round Rolled Catback Exhaust 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $2,224.99 |

IN STOCK S4601304THE ONLY EXHAUST YOU'LL EVER NEED - MBRP ARMOR PRO Series exhaust systems are backed by a Lifetime Warranty and crafted out of T304Stainless Steel - the most durable material grade that money can buy. The T304 Stainless Steel tubing is easy to clean and maintain. It's the obvious choice for you if y... MBRP 15-18 Audi S3 304SS 3in Quad Split Rear Exit C/B System 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium / Progressiv $1,049.99 |
IN STOCK - DROPSHIPS S46013CFTHE ONLY EXHAUST YOU'LL EVER NEED - MBRP ARMOR PRO Series exhaust systems are backed by a Lifetime Warranty and crafted out of T304Stainless Steel - the most durable material grade that money can buy. The T304 Stainless Steel tubing is easy to clean and maintain. It's the obvious choice for you if y... MBRP 15-18 Audi S3 SS 3in Quad Split Rear Exit w/ Carbon Fiber Tips - T304 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium / Progressiv $1,184.99 |
IN STOCK S46043CFTHE ONLY EXHAUST YOU'LL EVER NEED - MBRP ARMOR PRO Series exhaust systems are backed by a Lifetime Warranty and crafted out of T304Stainless Steel - the most durable material grade that money can buy. The T304 Stainless Steel tubing is easy to clean and maintain. It's the obvious choice for you if y... MBRP 15-20 Audi S3 T304 Stainless Steel Cat - Active 2015-2019 Audi S3 Prestige 2015-2020 Audi S3 Premium Plus 2020-2020 Audi S3 Premium $1,604.99 |
IN STOCK - DROPSHIPS S46193CFTHE ONLY EXHAUST YOU'LL EVER NEED - MBRP ARMOR PRO Series exhaust systems are backed by a Lifetime Warranty and crafted out of T304Stainless Steel - the most durable material grade that money can buy. The T304 Stainless Steel tubing is easy to clean and maintain. It's the obvious choice for you if y... MBRP 2022+ Audi S3 3in Cat Back w/ Quad Carbon Fiber Tips- T304 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $1,624.99 |
IN STOCK - LOW S4620304The only exhaust you'll ever need - MBRP Armor Pro Series exhaust systems are backed by a Lifetime Warranty and crafted out of T304 Stainless Steel - the most durable material grade that money can buy. The T304 Stainless Steel tubing is easy to clean and maintain. It's the obvious choice for you if ... MBRP 22-24 Audi S3 2.0L Armor Pro T304 SS 3in Cat-Back Quad Split Rear Exhaust - Valve Delete 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $974.99 |
IN STOCK - DROPSHIPS S46203CFThe only exhaust you'll ever need - MBRP Armor Pro Series exhaust systems are backed by a Lifetime Warranty and crafted out of T304 Stainless Steel - the most durable material grade that money can buy. The T304 Stainless Steel tubing is easy to clean and maintain. It's the obvious choice for you if ... MBRP 22-24 Audi S3 2.0L Armor Pro T304 SS 3in Cat-Back Quad Split Rear Exhaust w/ Carbon Fiber Tips 2022-2025 Audi S3 Premium / Premium Plus / Prestige 2026-2026 Audi S3 Base $1,049.99 |