HomeAudi S4 B6 2003–2005 4.2 N/A V8Stock : 340HP / 310LB-FTStage 1: 367 HP/ 330 LB-FT (HP+22 LB-FT+20)Stage2: 375HP/363LB-FT(HP+35 LB-FT+53)C$449.00PriceOptionalSelectQuantityAdd to Cart