So what does everyone think? It seems most people go with the power bomb but someone told me the mega gives you more low end torque? Is this correct? It is most likely going to be my next purchase (one or the other) I just put the powercore 4 on tonight. Also will I notice more of anything going with a different header over the stock, or is it just to quite it down?

 

I've got the powerbomb and I love it. Next to the Powercore 4 it was my best add-on. It changes the sound, maybe deeper but it didn't really make it alot quieter. It did give me a nice snap right off idle to pull the front end up at will in first gear. I don't really know if it added power or just changed how it is delivered but it was a noticable and positive change as far as I'm concerned. It didn't affect the jetting from what I can tell either. The pipe itself is larger than stock by quite a little bit. Install took about 10 minutes and was strait forward as can be. I have no idea about the Megabomb though, hopefully even better.