ok fellas, i am getting ready to do the exhaust on my truck. i got some "flowmonsters" cats off ebay for $100 for 2. they are knock offs of the dynatech cats. pretty nice. i got some imco extremes for mufflers, i really like them! so here is what i am asking theses are suppost to be "high flow" cats, and they are only 11" long and the ceramic itself is probably only 3-4" long inside. i really like how it sounds w/ just the mufflers. do i hollow them out, or let them alone. and i want to run an h-pipe so do i put the cats on then the h-pipe or vice-versa? i want to run the exhaust out the side in front off the rear tires, any thoughts on that? or do you guys think it would sound better out the back? i think i want to put the cats on then the h-pipe right out the back of the cats, then go like a foot or 2 into the mufflers, then i hope i still have room to go 45 deg. out the side, i don t want 90 deg, elbows (hurt flow?). should be pretty barky! i figure if i put the cats on in front i can just unbolt them from the headers and hollow them out if i don t like the sound. any thoughts or ideas would be greatly appreciated!