Smeding Diesel S400 Second-Gen Turbo Kit with Manifold (2003 - 2007 5.9L Cummins)

Unlock Maximum Power for Your Cummins

Give your 2003 - 2007 Dodge Ram 5.9L Cummins the airflow and performance it deserves with the Smeding Diesel S400 Second-Gen Turbo Kit. Designed, assembled, and quality-controlled right here in the USA, this kit delivers the perfect balance of durability, drivability, and raw power.

As diesel enthusiasts ourselves, we build our kits to perform for real-world drivers - whether you’re towing heavy, daily driving, or chasing big horsepower numbers.

What’s Included in the Kit

Unlike competitors who leave you sourcing extra parts, the Smeding Diesel S400 Kit comes complete with everything you need for a bolt-on install:

• S400 Turbocharger (choose from multiple sizes: S464/83, S467/83, S472/83, S472/87 - available in cast or billet wheel options)

• T4 3-Piece Exhaust Manifold for second-gen placement

• 4″ Downpipe for improved exhaust flow

• 5″ Intake Kit with Filter for maximum airflow

• Oil Feed & Drain Lines

• Intercooler Piping & Hardware for a clean, complete installation

Key Benefits

• Performance Your Way: Customize turbo size and housing (options in .90, 1.0, 1.10 A/R) to dial in spool, towing power, or top-end performance.

• Lower EGTs & Better Airflow: The second-gen location paired with the 5″ intake keeps your Cummins breathing cool, clean air.

• True Bolt-On Solution: No missing parts, no guesswork. Everything you need is in the box.

• Assembled in the USA: Built by diesel enthusiasts who understand your truck.

• Fast Shipping: Most kits ship within 24 - 48 hours so you can get back on the road.