2003-2007 Cummins S471 Turbo Swap Kit .90 AR (227423)

The Industrial Injection S471 Turbo Swap Kit converts the 2003-2007 5.9L Common Rail Cummins to a 2nd-gen-style single S471 setup, configured here with a tight .90 A/R turbine for hard-pulling, drivable-track power. It's the kit for builders who want all-out performance but still need the truck to come up on boost off the line.

The package ships as a complete bolt-on swap — turbo, custom S&B-designed intake, mounting hardware, gaskets, and clamps.

• Industrial Injection S471 single-turbo conversion
• .90 A/R turbine housing — quicker spool of the S471 family
• V-banded race compressor cover
• 71mm compressor wheel
• 83/74mm turbine wheel
• 90 lb/min rated airflow
• Custom S&B-designed intake
• Complete install kit — hardware, gaskets, clamps
• Lower EGTs vs. stock turbo
• Track-performance tuned
• Part Number: 227423

• Injector upgrades are required to support spool and performance with this kit.
• This kit is designed for competition use only.