Stigan turbo for 03-04 Cummins less than 2,000 miles on it. Spools great no issues whatsoever I decided to go a different route and no longer need this one. I have the factory 3.5 downpipe along with a 4 inch one. $450 obo paid over $600. May trade for Boom sticks or other stuff. Mainly looking for a big toolbox for inside.