INDUSTRIAL INJECTION 227423 S471 TURBO SWAP KIT — 2003–2007 5.9L CUMMINS (.90 A/R)

All-out track power with street-drivable manners. This 2nd-Gen style S471 kit centers the turbo for better cylinder distribution and lower EGTs. The .90 A/R turbine housing delivers quick(er) spool for an S400 while supporting serious airflow. Includes a V-banded race cover, complete install hardware, and a custom S&B–designed intake. Injector upgrades are required.

Fitment

• 2003–2007 Dodge Ram 2500/3500 5.9L Cummins (common rail)
• 2nd-Gen style swap location (center-mount) for 3rd-Gen trucks

What’s Included

• S471 turbocharger with V-banded race cover (.90 A/R)
• Complete install kit with lines/hardware
• Custom S&B–designed intake

Turbo Specs

• 71mm compressor wheel
• 83/74mm turbine wheel
• .90 A/R turbine housing
• ~90 lb/min airflow potential

Recommended Parts (CPP internal links only)

• Industrial Injection AC-0001 A/C Reroute Line (03–07) — maximizes clearance on 2nd-Gen swaps
• CPP DIY -10AN Turbo Drain Kit — clean, leak-free drain routing
• S&B CR-40035 4" Cleanable Filter or CR-40035D 4" Dry Filter
• Shop All 03–07 2nd-Gen Swap Parts
• 03–07 Turbochargers & Install Accessories

Alternatives / Cross-Shop

• S471 — 1.00 A/R (227424)
• S471 — 1.10 A/R (227425)

Helpful Notes

• Competition use only. Calibrate fuel and boost control appropriately.
• High-flow injectors and adequate lift pump/CP3 supply are required for proper spool and power.

FAQ

Among S471 options, the .90 A/R is the quickest-spooling choice and best for mixed street/track builds compared to 1.00 or 1.10 A/R housings.

Most 2nd-Gen swap layouts benefit from the reroute line for clearance and clean routing around the centered turbo location.

This kit uses a custom S&B–designed intake. If you need a replacement element, use a 4" S&B cone filter like CR-40035 (cleanable) or CR-40035D (dry).

At minimum: larger injectors, healthy lift pump, and a strong CP3. Proper tuning and boost control are essential for drivability and EGT management.