none it reduces back pressure and most likely slows it down. but it will be loud and the stupid noise will make you think it is faster.
about 100 horse.
gayness
100 horse.
About 5-10 hp depending on MODS
Between 100 and 200 horse.
240-260 horse power stock, supercharged. Buy a smaller pulley for supercharger add 30-60 horse power more.
Anywhere from 50whp-100whp depending on tuner
cat back? 12hp/12ft-lbs.
keep in mind flowmaster mufflers are chambered. so they wont flow nearly as good as say a magnaflow would. so you will get more HP with a magnaflow than a flowmaster unless you put a flowmaster outlaw series on. its pretty much just a street legal way of straight piping your truck it will flow way good but it will be loud cause there is no ceramic glass packing like magnafow has.
The "chip" or programmer should have that listed on the package.
10 to 20 percent