I know this thread is old, but nobody has followed-up on this.
I just purchased a cherry bomb 7481CB, it will arrive on Wednesday and I'll have it installed at the midpipe. I'm glad I'm not the only one that had this idea, instead of spending 340 dollars on a MAC pro-chamber. If it doesn't work, then I'll only be out $100~ dollars, and I'll order the pro-chamber.
I will also be having my car dyno'd this Friday.
I can't imagine the single piece of plate steel inside the 7481CB would really affect the exhaust that much besides a deeper tone. I currently have MAC boom tubes, so the added backpressure might be a benefit.
Last edited by Kaantu; 03-14-2016 at 03:54 PM.