Here are some mods that you can do to your A4 B8 that will breathe new life into it without breaking the bank.
The Brand-New ECS Street Performance Coilovers for your Audi B8 A4, A5, S4, or S5 – ECS Tuning
034Motorsport - Performance Parts & Tuning for Audi & Volkswagen
Valvetronic Designs Audi B8 / B8.5 S4 / S5 Valved Sport Exhaust System - Polished w/ 1x1 Carbon Tips AUD.B8.S4.VSES.PO.RC
5 Best Mods for B8/B8.5 Audi A4 – A Beginner's Guide – ModBargains.com's Blog
Been dreaming of this upgrade for a while… My new to me B8.5 RS5 next to my old B8.5 A5 : r/Audi
Inject some adrenaline and serious power into your Audi B8/B8/5 A4 - or C7 A6 2.0T within minutes - from your phone.
Integrated Engineering IE Audi 2.0T TSI / TFSI EA888 Gen1/2 Performance ECU Tune, Stage 1, Fits Audi B8/B8.5 A4, A5, Allroad, & C7 A6, Maximize Torque and Horsepower
5 Best Cheap Performance Mods for an Audi A4 B8
5 Best Cheap Performance Mods for an Audi A4 B8
B8/B8.5 S4/S5 3.0TFSI Tune – Jackal Motorsports
Why used audi are so cheap in the market? : r/Audi
Integrated Engineering is your source for Audi B8 S4 & S5 2.0T Cold Air Intake. Our easy to install and high-quality cold air intake kits add
IE Audi 2.0T TSI Cold Air Intake | Fits B8/B8.5 A4 & A5
AWE Touring Edition Exhaust and Downpipe Systems for B8/B8.5 A4 2.0T - AWE