I have a 03 saleen with the series IV blower. Do any of you have a distinct whine to your saleens? I don't hear anything with mine. Would a cai bring it alive? Also, the magnaflow x-pipe has 4 cats on it and is really constricting the sound. I'm thinking about swapping it out for another x-pipe. What brand do you recommend and what is better, with or without cats? Sound wise I mean. Thanks-Al