best best 2nd gen swap kit 6.7 cummins

If your 6.7 Cummins still runs the factory HE351VE or HE300VG variable-geometry turbo, you already know its limits: it spools fine for daily driving and towing, but it runs out of breath fast once you start chasing real horsepower. As FASS Motorsports explains, a “2nd gen swap” is the fix most serious Cummins owners land…