I'm currently running vancehines trueduals w/oval slip-ons on my 05 SE 103ci, I'm adding the zippers 575 g cams and a 50mm throttlebody, which exhaust system would be the better to run? D D fatcat 2 into 1 or stay w/ vance hines. Im not sure if the vancehines have enough bark for me, and Im trying to gain more performance. I appreciate if anyone has had any experience with these two systems. Thanks,

Mike

How did your build turn out? What pipes did you go with?

I also added the zippers thundermax ecm closed loop autotune system and their air cleaner upgrade kit, which gives you I think an extra 5/8" deeper air filter. I did go with the D D fatcat 2 into1 with the bungs on it from Zippersperformance so the thundermax ecm unit could self adjust or fine tune. I had the dealer do the install, and they wanted to see what the dyno indicated, it came in at 94 ponies and 95 t. I'm going to check it again because it's alot warmer now, than in the middle of February and 15 degrees. However, I'm very happy with the fatcat, love the sound it puts out. You'll love it. Quick response and acceleration.
Good Luck toneman, let me know how your turns out. Thanks