This 1998 Audi S4 B5 in striking Imola Yellow presents an incredible example of a well-executed performance build, blending OEM upgrades with tasteful modifications. With 263,409 km on the clock, this pre-facelift S4 has been transformed with a full AZR RS4 engine and gearbox, bringing an impressive Loba LO550 turbo setup, custom hard-piped front-mount intercooler, and RS4 MAF, Y-pipe, and throttle body. The Deca 630 injectors and Bosch 044 fuel pump ensure the car is well-fed, while a custom tune unlocks 550 horsepower and 690 Nm of torque, harnessed through the manual transmission for an exhilarating drive.

The exterior is distinctive, featuring wide front fenders, a facelift hood, fog lamp delete with OEM grills, and updated Audi and S4 badging, all contributing to a refreshed and aggressive look. The car rides on 19-inch OZ Superturismo LM wheels finished in deep black, paired with 255/30-19 Vredestein tires, and supported by H&R deep RSS coilovers for improved stance and handling. Stopping power has been enhanced with Porsche Z18 front brakes on 350mm discs, custom dust shields, and cooling ducts, along with S4 B7 rear brakes.

Inside, the black leather cabin features RS4 B5 rear seats and coveted RS4 B7 wing-back front seats, with backs painted in Imola to match the exterior. The trim has been upgraded with blue-weave carbon fiber, a S4 B8 steering wheel, and a custom stereo system, including a JBL subwoofer in a custom enclosure. An Innovate Dual wideband AFR gauge in the center vent keeps performance metrics in view.

With recent badges, suspension components, and upgraded logos, this Imola Yellow B5 S4 combines refined modifications with an attention to detail that make it as visually striking as it is thrilling to drive.