How to Make Your 6.7L Cummins a Worthwhile Investment
Bolt-on compound turbo systems are all the rage these days. In fact, they have been for years, and for good reason. No other modification allows you to add substantial horsepower yet retain factory-like drivability. With a correctly sized turbo arrangement, bottom end response and low-end torque improves, midrange power is strong, and the atmospheric charger allows big power to be made up top. If done right, you can drive daily, tow, and go racing all with the same setup. No matter what you use your truck for, it will do it better with a well-designed compound turbo system under the hood.
Fleece Performance Engineering has been in the turbo game for more than a decade, so when we heard they were developing a new compound turbo package for the 6.7L Cummins we leapt at the chance to see it installed on a ’16 Ram. To rule out reliability issues, as well as add considerable horsepower, the system scraps the factory variable geometry Holset HE351VE on the manifold in favor of an S362 SX-E from BorgWarner, and one of Fleece’s billet S475 chargers serves as the low-pressure unit. With the right supporting mods, this system can be pushed to the 850hp mark, but it’s also right at home in trucks with stock injectors. Warning: Further reading may have you spontaneously reaching for your credit card… DW
FLEECE PERFORMANCE ENGINEERING