ECU Tuning

 
APR - Audi 4.2L B8 S5 ECU Upgrade
Get more power and torque from your 4.2L V8 B8 Audi S5 with ...
DPP-42L-FSI
 $699.00 
In Store Only
EPL - 4.2 S5 Performance Software
Stage 1 Performance Software for B8 S5's with 4.2L V8 eng...
 $599.00