I took the saleen out for a little while today. I noticed the intercooler gauge would rise up half way and then quickly drop back down. This would happen while driving and at a stand still. Is this normal? Maybe I'm just not understanding how exactly to read the gauge, any help? Also, my saleen came with an x-pipe (since it's a 03 model ) but the 4 cats are holding back some sound. I was wondering if any of you had changed this out for another pipe. If so what did you put on and how is the sound? Thank you-Al