

Air Pre-Filter Sock
Get the most out of your Ford Cummins swap with the DPS Fummins Compound Turbo Kit. Whether you're building a Cummins-powered Excursion or an OBS Ford, this twin turbo system delivers high performance, lower EGTs, and OEM-like fitment—clearing the heater/AC box for easy installation on any Ford chassis.
Supporting power from 350 to 1300 HP, these kits provide fast spool-up, strong midrange torque, and excellent drivability. Ideal for towing, racing, sled pulling, or daily use.
Stage 2.5 Max 625hp S362/68/.70 over S475
Stage 3 Max 650hp S362/68/.70 over S480
Stage 4 Max 650hp S363/68/.70 over S475
Stage 4B Max 675hp S363/68/.70 over S480
Stage 4.5 Max 650hp S363/68/.70 Ball Bearing over S475
Stage 4.5B Max 675hp S363/68/.70 Ball Bearing over S480
Stage 5 Max 700hp S363/73/.80 over S475
Stage 5.5 Max 700hp S363/73/.80 Ball Bearing over S475
Stage 6 Max 750hp S363/73/.80 over S480
Stage 6.5 Max 750hp S363/73/.80 Ball Bearing over S480
Stage 8 Max 1100hp S366/73/.80 over S480
Stage 8.5 Max 1100hp S366/73/.80 Ball Bearing over S480
Diesel Power Source is the only manufacturer offering compound turbos built specifically for Fummins swaps. Our kits are CFD-tested, CAD/CAM-designed, and precision-engineered to deliver cooler, denser boost air—maximizing combustion, torque, and spool-up without sacrificing fitment or reliability.
Need a similar setup for your Chevy Cummins swap? Check out our Chummins Compound Kits.
Unlock serious performance in your Fummins project with DPS Compound Turbos—engineered for power, precision, and long-lasting reliability.
Thanks so much guys, fummins compounds fit like a glove. 97 f350 with 74k original miles , 6k on 24 valve Cummins & 47re swap ,shackle reversal , cross over steering and around 10 inch of lift .rolling on 37s .funny thing is I built this to pull our toy hauler. Can’t wait to pull with compounds. By the way I have to tell you I was skeptical of a fummins compound kit due to the lack of space but your guys on the phone assured me this kit would work. Wish I would have found you guys before I first installed my Cummins with a single BD turbo
These kits just fit and work with the HVAC box. I did have to modify the downpipe but I knew that going into the project. Dropped a 5.9L12V into a 2005 F350. Awesome power and torque, now just need to get the trans built.
This kit just fits! I went with the smaller 62/65 with s475 for my 2002 Excursion conversion. Best family tow vehicle. The kit fit and you told me I would have to modify the downpipe to fit and I just had a muffler shop do a custom fit downpipe and exhaust for me. We look forward to many more years of family camping with this new setup! Thanks DPS