S400/S400 Twin Piping Kit '03-'07 5.9

🔥 2003–2007 Cummins 5.9L Compound Turbo Piping Kit – Stainless Diesel 3G/4G T4 over T6 Twin Kit

Boost airflow, horsepower, and drivability with Stainless Diesel’s premium compound turbo piping kit — engineered for 2003–2007 Dodge Ram 2500/3500 5.9L Cummins Common Rail engines. This complete twin-turbo piping system is designed for an S400 T4 turbo on the manifold and a massive T6 S400 atmospheric turbo (5.00" or 5.50" inlet). Whether you're chasing 1100+ horsepower or just want unbeatable throttle response and lower EGTs, this kit delivers.

Made in the USA with CNC-cut flanges, TIG-welded aluminized mild steel piping, and our industry-leading 5-layer silicone boots, this system is built to withstand 100+ PSI of boost and years of hard use.

—

💪 Fitment & Performance

• Vehicle: 2003–2007 Dodge Ram 2500 / 3500 (3rd Gen Cummins 5.9L)

• Turbo Compatibility: T4 S400 manifold charger + T6 S400 atmospheric charger

• Turbo Inlet Support: 5.00" or 5.50"

• Horsepower Range: Up to 1100+ HP with the proper setup

• Designed for: Performance street builds, towing monsters, or competition trucks

—

✅ Included in This Kit:

• 5x12 High-Flow S&B PowerCone Air Filter

• 5.00" Air Intake Pipe

• 5.00" or 5.00"–5.50" Silicone Intake Boot w/ T-Bolt Clamps

• 3.50"–5.00" Silicone Reducer + Clamps

• Choice of 4.00" or 5.00" Downpipe

• 3.00" Bead-Rolled Intercooler Pipe

• 3.50" One-Piece Cold Pipe w/ O-Ring Flange, Bead-Rolled Ends & 1/8” NPT Port (boost reference)

• Braided Stainless High-Temp Oil Supply Lines

• Oil Feed & Drain Fittings + Gaskets

• S400 Turbo Mounting Bracket

• Turbo Mounting Studs & Nuts

• CNC’d T4 1.00” Spacer

• V-Band Clamps & High Torque T-Bolt Clamps

• Short Stretch Heat-Insulated Hot Pipe (CNC’d Flanges for Max Heat Retention)

• Water Line Relocation Kit (w/ Fittings)

• Installation Guide w/ Photos

• Optional High-Quality Powder Coating in Custom Colors

—

🛠️ Built for Boost. Made to Fit.

• CNC-Machined Flanges & Engine-Jigged Fitment

• TIG-Welded Piping (Aluminized Mild Steel)

• 5-Layer Reinforced Silicone Boots Rated for 100+ PSI

• Superior to competitors using rubber hoses or plastic piping

• Made in the USA 🇺🇸

—

🚀 Why Go Compound?

This T4-over-T6 twin turbo piping system allows you to pair your favorite high-flow S400 manifold turbo with a large-frame atmospheric S400 for maximum airflow, reduced EGTs, quicker spool, and reliable big-boost performance.

Customize your airflow with your choice of turbos (cast, billet, or 5-blade options) and own the street, track, or tow lane.

—

Order your Stainless Diesel 3rd/4th Gen Compound Turbo Piping Kit today and take your 5.9L Cummins to the next level of power and reliability!