AWE Tuning Track Edition Exhaust System for Audi RS5 (3020-32010) 17715 K&N Recharger Kit 99-5000 is

K&N Recharger Kit 99-5000 is designed to restore the performance of your K&N oiled cotton air filter

Deatschwerks 165lph in-tank fuel pump w/ 9-1028 install kit

To illustrate their importance

This kit gives you a progressive rate sleeve-style air spring over 30-level damping

If you want a more aggressive exhaust note

AWE Tuning Track Edition Exhaust System for Audi RS5 (3020-32010) 17715 K&N Recharger Kit 99-5000 isThe RS5 Track Edition Exhaust was designed for those seeking additional growl. The Track Edition brings out an aggressive, raw V8 rumble. Still suitable for a daily driver, this "noticeable" system lets them know you're coming. The RS5 Track Edition system features specially designed Helmholtz Resonators and reuses the stock downpipes to give the RS5 a true V8 sound. Please note that this is a loud system and buyers should be aware. This product