I started getting some pretty consistent boost surging, and was getting over-boosting up to 19psi with a mostly stock setup. I traced this back to a little tear in the vacuum line between the compressor housing and the wastegate actuator, and instead of paying $40 for just that one hose (and maybe then running into other problems down the line since the rest of the system is 20+ years old), I decided to replace the whole boost control system with this COBB EBCS. Easy install, fixed both of the issues caused by the vacuum leak, and paired with the Stage 1+ EBCS OTS map, it runs like a dream.