Just found your question. No did not loose A/C just cruise control and fan when the heat is on. Neither of which is a big deal to me. The intercooler makes a huge difference in performance. A twin to my car ('97 C4S) pulled 350 wheel hp on the dyno. I also substantially improved throttle response by installing a lightweight flywheel while the engine was out. My reliability has been 100% and I have well over 25,000 miles of not so gentle use on the engine. Just do it.