Industrial Injection 227423 S471 2nd Gen Turbo Swap Kit for 2003-2007 5.9L Cummins .90 A/R

The Industrial Injection 227423 is a complete S471 turbocharger swap kit engineered for the 2003–2007 Dodge Ram 5.9L Common Rail Cummins diesel. This kit repositions the turbo to a center-mount, 2nd-gen-style location on the engine to equalize airflow across all cylinders and unlock serious power potential beyond the limits of the factory turbocharger.

This specific configuration features a .90 A/R turbine housing, which provides quicker spool-up and strong pulling power, making it ideal for high-performance street and track builds that demand responsive boost delivery. The factory turbocharger on 2003–2007 Cummins trucks is rated for sub-450 horsepower; once that threshold is exceeded, the OEM unit becomes a limiting factor. This S471 swap eliminates that ceiling and repositions the charger to improve cylinder-to-cylinder air distribution.

Key Features:

• 71mm compressor wheel for high-volume airflow
• 83/74mm turbine wheel matched to the .90 A/R turbine housing for responsive spool
• Rated airflow capacity of 90 lbs/min
• V-Banded race cover improves airflow efficiency and reduces exhaust gas temperatures (EGTs)
• Custom S&B-designed intake optimized for this swap configuration
• Complete install kit — includes turbo, mounting hardware, gaskets, and clamps for a clean installation
• Available in multiple turbine housing options (.90, 1.00, 1.10 A/R)

Important Notes: Injector upgrades are required to maximize spool-up and overall performance. Custom tuning is strongly recommended. This kit is designed for competition use only and is not legal for on-road, off-road, or dual-use applications.