V-Band flange and clamp kit for Holset HX40 turbine outlet. This is perfect for your dps or other turbo upgrade for your 1st or 2nd gen cummins. Includes Stainless V-Band clamp and 304 Stainless Steel weld flange that allows a 4" tube to be welded to the ouside and a 3.5" tube to be welded to the inside.  This kit fits the standard HX40 (4" OD V-Band), and fits Borg Warner's 174430 S300 upgrades for the Cummins 5.9.