After a very long week in the shop I had a very good day at the dyno. After having Chris at Relentless Diesel install his upgraded cp3 my truck gained 87 horsepower at rear wheels, bringing my new hp to 664. This was done on a dynojet and that is with no correction factor. The modification is still in the test phase(there might still be more to had)we have more testing to do. Ive been driving it for a few days and have had no bad effects,temps stayed about where they used to be and it does smoke more but only on higher levels. Anyone interested can contact Relentless Diesel at 936-856-3121 or at www.relentlessdiesel.com.