Ok, so I have a 1994 S4 that I bought in September and am currently going through the car and fixing some things. I'm making the engine run better (tune-up etc) and am now finding out the brakes don't stop that great. I've been going through numerous posts about Toyota brakes, Brembo's etc and have a few questions. The previous owner installed new pads front and rear, but they are EBC yellowstuff, which look to be more of a track only pad. Any thoughts if I replace the stock rotors with cross-drilled and slotted and upgrade the pads to Porterfield R4S? This I can do for less than $300. Or should I bite the bullet and buy the Hi-Tech upgrade kit with new 4-piston calipers and larger rotors for $1000? What is happening is that if I'm going like 80-90mph on a straightaway, when I hit the brakes to slow down, it's almost as if I'm driving in rain - I get nothing for a little while and then it slows, but I gotta keep my foot in it, almost like the rotors are glazed maybe? The pedal is firm and not soft. Oh and the car already has ss brake hoses front and rear.