Force Pro-Series Mufflers?

i bought a set and yesterday i was bored so i put a set of stock headers on backwards and held the mufflers to the headers. they sound good but pretty mellow at idle with stock headers. remember i did not have a midpipe, just headers and it was leaking also so i am sure it it be alittle meaner sounding. sound awsome with the fcam. when revved it wakes up. i am going to put long tubes on with an O/R bassanni xpipe on and some heads soon, it should sound meaner. great quality from what i can tell for the price