f-151,
an ~1" adapter was provided which i used to mate the turbo to the 4" exhaust - it initially wasn't a 100% alignment so i had to muscle the exhaust to get everything to come together. it sounds good! a little (very little) exhaust whistle - nice throaty sound but not obnoxious in the cab. the super b sounds like a turbine on an airline out of the compressor side - the Scotty5 i have enriches this "airliner" sound.
IMO the banks exhaust is the best 4" out there and one of the few banks products that leads in quality and engineering in it's category.
bertram,
if you are not going all out on your 03, you may want to go with piers modified hy-35. it has a bigger compressor wheel, beefier bearings and i think a stronger shaft -- and the price is only around 400 bucks (or less). i think this piersIfied turbo is similar to what the 04. 5s and up use. and i would recommend pt-motorsports.com for the lowest price.
good luck, ron