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0199X | Cummins ISX T6 Flange Ceramic Coated Manifold with Install Kit | Highway and Heavy Parts

Pricing: $2,184.21

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Are you willing to leave MPG on the table?

The Exhaust Manifold never gets the credit it deserves? that is, until it forms a crack. While it doesn't look like the Exhaust Manifold is an integral part of your engine, that leaking exhaust gas is just horsepower, torque, and ultimately, fuel efficiency vanishing into thin air.

Whether you are seeking a replacement Exhaust Manifold, increased fuel efficiency, or are looking for a extra ’kick’ on the highway with a Performance Exhaust Manifold, Highway and Heavy Parts has you covered. And, while some equate aftermarket parts with the term, ’subpar’, HHP is here to set the record straight. HHP only offers premium Exhaust Manifolds with a industry leading 2 Year Warranty, all with savings up to 50% off OEM prices.How’s that for an aftermarket part?

Looking for proof? Let’s talk Exhaust Manifolds.

  • Get a brand new manifold made to OE specifications. You'll get equal or better quality compared to the OE at a much lower price.

  • A few benefits of a new manifold are improved gasket life and reduced turbo lag. Also, fuel mileage can be increased by .2-.3 MPG in addition to horsepower.

  • On top of that, this manifold is ceramic coated to reduce heat and improve air velocity, while also having a temperature resistant coating to improve turbo response.

  • You'll get long lasting strength and durability with a manifold made of high blended steel. Also, you'll get quality you deserve because each manifold is flow tested and made in the USA.

  • Replace your worn out manifold to maximize you engine. Simply put, you'll get quality and consistency you can count on.


  • (1) Exhaust Manifold
    • (1) Install Kit


2-Year Warranty

Warranty acceptance/denial will be at the sole discreation of each respected manufacturer. Each of HHP's manufacturers utilizes their own warranty procedures which vary in claim review time (typically between 3-5 weeks). On items that carry a labor warranty, rates are paid on flat-rate book time. Rates vary by manufacturer.

OEM Applications:
  • 0199X

Technical Data

ISX Engine Specifications:
Year: 2010-2018
Liter: 11.9
CID: 726
Engine Code: ISX 11.9
Cylinders: L 6
Bore/Stroke: 5.1181-5.1196", 5.9055"
Compression Ratio: -
Firing Order:1-5-3-6-2-4
Comments: SOHC Turbo Diesel Engine, 320-500 HP

Tune-Up Specifications:
Intake Valve Lash: .014"
Exhaust Valve Lash: .032" Cold

ISX Engine Specifications:
Year: 1997-2010
Liter: 15.0
CID: 912
Engine Code: ISX
Cylinders: L 6
Bore/Stroke: 5.3937-5.4000", 6.653"
Compression Ratio: 18.0 :1
Firing Order: 1-5-3-6-2-4
24 Valve, ISX, QSX, DOHC, Signature 600 Series

Tune-Up Specifications:
Intake Valve Lash: .014" Cold
Exhaust Valve Lash: .027" Cold


  • P254515
  • P254515
  • HHP
  • New

Shipping Information

  • Item Requires Shipping
  • 42.0 lbs.
  • W8.0000” x H9.5000” x L41.5000”

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