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2021 Audi S4 Performance Parts

Looking for aftermarket parts to modify or upgrade your 2021 Audi S4? At Tunersports.com we carry a huge selection of the top name brand performance parts and accessories for your S4.

Whether you have a 2021 Audi S4 in Premium to Prestige trim we have you covered. From air intake systems to wheel and tire accessories we have 117 available parts to mod your S4, all with free shipping to the Continental US 48 States.

2021 S4 Parts:

Recently Added Audi S4 Aftermarket Parts:

IN STOCK - LOW Thule WingBar Edge Load Bars 721420 Thule WingBar Edge 95cm Roof Bar (1-Pack) $130.68 Details
IN STOCK - LOW Thule Edge Foot Pack 720501 Thule Edge Clamp Foot Pack $313.28 Details
IN STOCK MBRP Catback Exhaust 304 S4607304 MBRP 18-21 Audi S5 Coupe/S4 Sedan T304 SS 2.5in Cat-Back Quad Rear Exit Exhaust - SS Tips $981.74 Details
IN STOCK MBRP Catback Exhaust 304 S46073CF MBRP 18-21 Audi S5 Coupe/S4 Sedan T304 SS 2.5in Cat-Back Quad Rear Exit Exhaust - Carbon Fiber Tips $1,070.99 Details
IN STOCK aFe Scorcher Module 77-92005 aFe 17-20 Audi A3 / 15-20 Audi A4 Scorcher High-Performance Ignition Coil $62.26 SALE Details
IN STOCK - LOW aFe Ignition Coils 77-92005-MC aFe 19-23 Audi S4 / 19-23 Audi S5 SCORCHER High-Performance Ignition Coil $254.98 SALE Details
IN STOCK Go Fast Bits VTA Valves T9480 GFB VTA Blow Off Valve 2022+ VW Golf R Mk8 / 2016+ Audi S4 B9 w/Continental Diverter $258.30 SALE VIEW PRICE IN CART Details
IN STOCK Go Fast Bits DV+ Diverter Valves T9380 GFB Diverter Valve DV+ 2022+ VW Golf GTI/Golf R Mk8 (EA888) / 2018+ Audi RS5 B9 2.9TFSI $242.10 SALE VIEW PRICE IN CART Details
IN STOCK aFe Wheel Spacers 610-721003-B aFe CONTROL Billet Aluminum Wheel Spacers 5x112 CB66.6 18mm - Toyota GR Supra/BMW G-Series $109.78 SALE Details
IN STOCK - LOW LIQUI MOLY Motor Oil - Top Tec 6200 22186 LIQUI MOLY 20L Top Tec 6200 Motor Oil SAE 0W20 $186.53 SALE VIEW PRICE IN CART Details

Popular Audi S4 Aftermarket Parts:

IN STOCK Injen SP Intake SP3082WR Injen 18-19 Audi S4/S5 (B9) 3.0L Turbo Wrinkle Red Short Ram Intake $316.76 Details
IN STOCK AWE Tuning AirGate Intake 2660-15032 AWE Tuning Audi B9/B9.5 S4/S5/RS5 3.0T Carbon Fiber AirGate Intake w/ Lid $995.00 Details
IN STOCK Injen SP Intake SP3082WB Injen 18-19 Audi S4/S5 (B9) 3.0L Turbo Wrinkle Black Short Ram Intake $316.76 Details
IN STOCK Go Fast Bits DV+ Diverter Valves T9380 GFB Diverter Valve DV+ 2022+ VW Golf GTI/Golf R Mk8 (EA888) / 2018+ Audi RS5 B9 2.9TFSI $242.10 SALE VIEW PRICE IN CART Details
IN STOCK EBC Yellowstuff Brake Pad Sets DP42254R EBC 17-18 Audi A4 / A4 Quattro / A5 Quattro Yellowstuff Rear Brake Pads $114.05 Details
IN STOCK Injen Intercooler Piping SES3082ICPWR Injen 18-19 Audi S4/S5 (B9) V6 3.0L Turbo Wrinkle Red Intercooler Piping $388.76 Details
IN STOCK Go Fast Bits VTA Valves T9480 GFB VTA Blow Off Valve 2022+ VW Golf R Mk8 / 2016+ Audi S4 B9 w/Continental Diverter $258.30 SALE VIEW PRICE IN CART Details
IN STOCK EBC Yellowstuff Brake Pad Sets DP42277R EBC 2016+ Audi Q7 Yellowstuff Front Brake Pads $197.74 Details
IN STOCK EBC GD Sport Rotor Sets GD1846 EBC 12+ Audi A6 Quattro 3.0 Supercharged GD Sport Rear Rotors $299.76 Details
IN STOCK Bilstein B8 Series Shocks 24-274876 Bilstein B8 17-19 A4/A4 Quattro / 18-19 S4/S5 18-20 A5/S5 Sportback w/ Sport Susp 49mm Front Shock $228.00 SALE VIEW PRICE IN CART Details