2003-2007 Cummins S400 Turbo Kit w/ Manifold (C0307648390C2GK)

Smeding Diesel S400 Second Gen Piping Kit comes with everything you need to safely, effectively, and properly install a S400 series turbocharger on your Cummins. With the freedom to choose your turbo and exhaust housing size to fit your driving application. The fitment is precise, and the finish is perfectly polished with smooth mandrel bends for superior airflow and enhanced performance.

The 3-piece manifold offers better thermal expansion and contraction to eliminate the possibility of cracking or warping, and paired with the S400 series turbocharger, it effectively provides you with improved exhaust flow, reduced back pressure, quicker turbo spooling, increased horsepower, and fuel economy.

Part Number: C0307648390C2GK

• All piping is polished with smooth mandrel bends
• T4 3-piece manifold reduces turbo lag time and cooler EGTs
• Balanced airflow with maximum power output
• Improved reliability and reduced backpressure

Includes:

• Smeding S400 series Turbocharger
• Smeding T4 3 pc Exhaust Manifold
• 4" Down Pipe
• 5" Air Intake kit w/S&B filter
• Oil Feed Line
• Oil Drain Line,
• Intercooler piping
• All necessary parts are included for installation

• S472/87 SXE-R Billet - Includes SXE-R wheel and Steel 360 Bearing

Don't see your question? Ask us anything about this product.

• ?

  What’s the difference in exhaust housing sizes? What does it change thanks

  0.90 = Quicker spool-up and better throttle response. Also creates higher drive pressure and restricts top-end flow, which can increase EGTs at high load/RPM.

  1.0 = A good balance between spool-up and top-end performance. Recommended for most street and performance builds

  1.10 = Slower spool-up and slightly increased turbo lag. Allows for maximum flow on the top end, which reduces drive pressure and lowers EGTs at high horsepower/high RPM.

• ?

  what size injector would you recommended

  150% over injectors are a solid match for the S400 turbo range.