New exhaust install next week....

[chgr500]

I going to be insuring for the season this weekend and have booked for a new exhaust install next wednesday...going with a mandrel bent 2 1/2" exhaust from H/P manifolds to tips with an X pipe install....I am likely going to install flo pro mufflers...I know they are a chambered muffler and loss of possible h/p..but my car is pretty much stock 383..besides I have old muffler man style exhaust from yesteryears on there now with lots of crushed bends on the angles...these new mufflers should be less restictive and mandrel bent pipes should flow....most will say dynaflow...but i have to order them in.....anyone ever use these?.....any pros or cons to this choice before Wednesday.....

http://www.flopro.com/FloPro.htm