Audi s4 performance kit

Modified B8.5 Audi S4 Review - 500HP 6MT APR Ultracharged

ECS Tuning: APR 3.0 TFSI Stage 2+ Supercharger Pulley Upgrade Kit DIY

B8 S4 (STAGE 1) IS IT WORTH IT?

Audi S4 Front Brake Upgrade | 2 Piece Rotors

My Audi S4 | Every Single Modification

Audi S4 Stock Vs. Audi S4 with APR Chip

The PERFECT Exhaust for my B8.5 S4! AWE Touring Install

Audi B8 S4 Magnuson Supercharger Kit

Stage 1 B8.5 S4 Hits the Dyno!

Audi B8 S4 Air Lift Performance Review!