Product description
T3 Exhaust Manifold for 12V Cummins | Fummins, Chummins, RV, Bus & Industrial | Clears Heater Core
The Diesel Power Source® T3 exhaust manifold for 12V Cummins swap, RV, bus, and industrial applications is a performance 2-piece manifold specifically designed to place the turbo low and to the rear of the engine, clearing the heater and AC core on Ford Cummins (Fummins) conversions, Chevy Cummins (Chummins) swaps, and other non-Dodge applications where the standard Dodge Ram turbo location creates clearance problems.
This manifold fits all 1988–1998 Cummins 5.9L 12-valve engines with T3 flange turbochargers. It is cast from high-nickel ductile iron, CFD designed for improved exhaust flow and turbo spool-up, and features expansion joints to prevent cracking. This manifold is CARB exempt with an Executive Order (EO) number.
Why This Manifold Instead of the Standard 12V Manifold
The standard DPS T3 manifold for 12V Cummins is designed for Dodge Ram trucks where the factory turbo location has adequate clearance. In Fummins and Chummins swaps, the Ford or Chevy engine bay places the heater core and AC components on the passenger side of the engine compartment, directly in the path of a standard turbo mount. RV, bus, and industrial installations often have similar clearance constraints.
This manifold solves that problem by positioning the turbo flange low and to the rear, in the 3rd gen or industrial turbo location. This clears the heater/AC core on Ford and Chevy chassis while maintaining proper exhaust flow to the turbocharger. If your 12V Cummins is in a Dodge Ram truck, use the standard 12V T3 Manifold instead.
Applications
- Ford Cummins Swap (Fummins) — F250, F350, Excursion, and other Ford trucks with 12V Cummins conversions. Clears Ford heater core and AC components. Compatible with Ford 7.3 to Cummins conversion kits.
- Chevy Cummins Swap (Chummins) — Silverado 2500HD, 3500HD, and other GM trucks with 12V Cummins swaps. Clears GM chassis constraints including steering, crossmember, and heater core.
- RV and Motorhome — Cummins-powered motorhomes and RVs where the turbo needs to clear auxiliary systems and coach components.
- School Bus and Commercial Bus — Bus applications with the 5.9L 12V Cummins.
- Industrial and Marine — Non-automotive 12V Cummins applications where turbo placement requires a low-rear mounting position.
