What exhaust products that are out there on the market that you guys think is a waste of money or no need for and why.?

pretty vague question....

BUT for the Bonneville the Stock exhaust (minus the Exhaust Manifolds) are good for a 13 sec car...

Keep it stock for awhile. You've got better things to spend money on.

Have to respectfully disagree. While leaving the exhaust stock is a very pragmatic decision, swapping to a Flowmaster or Magnaflow produces pure, unadulterated auditory pleasure. The sound is well worth the price, IMO...

That by no means guarantees the car wouldn't benefit from exhaust work.

Tell us more Jason. Do you know something more than the several 2000'* that took their cars into the 13'* on stock piping and components?

a 3" downpipe

I'd be looking at PEM'* or headers before that. Or at the same time. Keep the cat, resonator and mufflers for now.

even on a well modded SSEi....Billboost lost a lot of low end with his 3" DP, that fact is well known

low end isnt everything too. i would sacrafice 5ftlbs low end for 10hp top end