Diesel Power Source® T3 Exhaust Manifold for Cummins® 12-Valve, 2-Piece (SKU 2151)

The Diesel Power Source® T3 exhaust manifold for 12-Valve 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 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.

This exhaust manifold moves the turbo away from the A/C box on the fire wall and provides about 6" of clearance, with additional hood clearance as well. The turbocharger must be re-oriented so that the oil drain tube points straight down. 

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 12-Valve Cummins is in a Dodge Ram truck, use the standard 12-Valve T3 Manifold (DCS SKU 3216) instead.

Includes

• Hardware to mount manifold to the engine
• For upgraded manifold hardware and gaskets, see DCS SKU 1229

Features

• Clears Heater/AC Core — Turbo mounts low and rear, solving the #1 clearance issue on Fummins and Chummins swaps
• 2-Piece Expansion Joint Design — Prevents cracking from thermal cycling
• CFD Designed — Improved exhaust flow and turbo spool-up over factory manifolds
• High-Nickel Ductile Iron — Handles extreme heat with minimal expansion
• CARB Exempt (EO Numbered) — Legal for use in California
• T3 Flange — Compatible with DPS S300 turbos, factory turbochargers, and most aftermarket T3 turbos
• Fits All 12V Applications — Ford swaps, Chevy swaps, RV, bus, motorhome, industrial
• Ceramic Coated — High-temperature black ceramic finish

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.
• 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 12-Valve Cummins applications where turbo placement requires a low-rear mounting position.

Stock manifolds are known to shrink significantly, causing manifold-cracking, gasket problems, and exhaust flow problems created by exhaust port misalignment. The 2-Piece Manifold, on the other hand, allows manifold to expand and contract with heat, eliminating warping and cracking to the manifold, eliminating the dreaded manifold shrinkage. This 2-Piece Manifold has improved air flow allowing better fuel efficiency while increasing overall horsepower and torque.

If you intent on utilizing the stock turbo charger (Holstet HX 35), you will also need to use the wastegate actuator, DCS SKU 1077.

**This Diesel Power Source exhaust manifold has been granted an exemption by CARB, which means they are legal to be installed and used in the state of California.