C5 [98-03]
Stage 1 - 2.7T APB / BEL
USD $350.00
Previously known as Gonzo Tuning Stage 2 STAGE 1: 320HP / 350LB-TQ Info: Designed to run 16psi..
Stage 2 - 2.7T APB / BEL
USD $450.00
STAGE 2: 330HP / 375LB-TQ Info: Designed to run 20psi of boost and for 93 Octane / 98 RON gas (wi..
Tiptronic TCU Software (B5/B6/C5)
USD $400.00
STAGE 1 Info: Tiptronic TCU software Precisely Engineered to run combined with a GTS Stage 1..
Stage 3 - 2.7T APB/BEL K04
USD $550.00
Gonzo Tuning STAGE 3 Info: Custom tuning tailored to your own car.  Gas: Optimi..
Stage 4 - Big Turbo/Custom B5 S4
USD $700.00
Gonzo Tuning STAGE 4 Info: Custom tuning tailored to your own car. A connecting rod upgrade ..