Black Chrome BFI Crest Coin for Heavy Weight Shift Knobs Audi S4 B6 4.2L quattro with the goal of optimizing

with the goal of optimizing power delivery without compromising the longevity of the engine and related components

this system only fits the pre-facelifted model

where extended bodywork requires careful airflow management to maintain balanced aerodynamic performance

Up to 2" of lowering in front and 2-1/8" of lowering in back are possible depending on tire clearance but with diminished ride quality

Up to +30 HP and +50 lb-ft (N47)

Black Chrome BFI Crest Coin for Heavy Weight Shift Knobs Audi S4 B6 4.2L quattro with the goal of optimizingBlack Chrome BFI Crest Coin for Heavy Weight shift knobs. FIT ALL GS1 GS2 GSB DOES NOT FIT GSA *Shift knob not included.