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Manifolds

X15

1 Piece Stainless Steel T4

3 Piece Press Fit T4

 Increase your X15's performance with our high-flow exhaust manifold, engineered to improve exhaust flow by up to 20% over the factory design. Includes the bellows kit for a complete installation. An optional thermal coating is available and recommended for maximum durability, improved heat retention, and long-term reliability. Features a pre-machined EGT port with a removable plug, making EGT sensor installation quick and easy whenever needed.

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3 Piece Press Fit T4

1 Piece Stainless Steel T4

3 Piece Press Fit T4

 Designed for durability and affordability, this 3-piece manifold withstands high pressure without leaking. Its segmented design allows slight flexing during heat cycles, reducing the risk of cracking or warping. It features two EGT probe ports with optional block-off plugs and includes titanium hardware and gaskets for a complete installation. 

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1 Piece Stainless Steel T4

1 Piece Stainless Steel T4

1 Piece Stainless Steel T4

Built for big power, this manifold is designed to handle extreme temperatures with ease. It features two EGT ports and a versatile wastegate port that can be used or capped off as needed. The package includes a wastegate cap-off plate, EGT plugs, gaskets, and lightweight titanium hardware for a complete, high-performance setup

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1 Piece HSM T6

6.7 Cummins OE Replacement

1 Piece Stainless Steel T4

 Engineered for maximum airflow, this manifold features a T6 flange and stands as our highest-flowing option. Casted from ultra ultra-high-silicon moly, it resists warping and cracking under extreme conditions. The package includes gaskets, EGT plugs, and premium titanium hardware for a complete, high-performance installation.

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6.7 Cummins OE Replacement

6.7 Cummins OE Replacement

6.7 Cummins OE Replacement

 Perfect for factory replacement. This manifold features a high-flow option but retains the factory sizes and EGR ports for a daily driver or mild performance build. Factory T3 flange. Comes with all titanium hardware and 2 optional EGT ports. Made using High-Silicon Moly.  

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OEM Replacment

    Heavy Duty Cummins X15

    X15 3 piece HSM manifold with upgraded true seal joints. Features an optional EGT port and our Tri Seal Technology (TST) Titanium hardware included

    X15 Close up... Includes everything you see

    Additional Info

     

    Increase your X15’s performance with ITI’s high-flow 3-piece exhaust manifold, engineered to improve exhaust flow by up to 20% over the factory design. Manufactured from high-silicon molybdenum cast iron, it provides superior high-temperature strength, oxidation resistance, dimensional stability, and resistance to thermal-fatigue cracking.

    ITI’s Triple-Seal Piston Ring technology improves sealing between all three manifold sections while allowing easier installation and removal compared with rigid or interference-style joints. The design also accommodates thermal expansion and contraction, helping reduce stress across the manifold during repeated heat cycles.

    If selected, the manifold includes the bellows kit for a complete installation. An optional thermal coating is also available and recommended for maximum durability, improved heat retention, and long-term reliability. A pre-machined EGT port with removable plug is included, making EGT sensor installation quick and easy whenever needed.

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