Full Tilt Performance

FULL TILT | ISX CM870 Ceramic Coated Exhaust Manifold

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  • FULL TILT | ISX CM870 Ceramic Coated Exhaust Manifold
  • FULL TILT | ISX CM870 Ceramic Coated Exhaust Manifold
  • FULL TILT | ISX CM870 Ceramic Coated Exhaust Manifold


Full Tilt Performance manifolds have been designed to improve on all aspects over the manufacturers. All of our manifolds are cast out of a proprietary high quality blended steel, one of the hardest and most heat tolerant metals available today.

Thicker exhaust flanges and center dividers provide greater strength and durability for even the hardest working trucks. The joints have been designed with tighter tolerances, 50% more surface contact, and are press fit to ensure that they never leak. With thousands of hours of work by our engineering team, we have eliminated the sharp turns and twists to create smooth airflow to the turbo.

From there we top it off by smoothing out the interior even more by hand. Then we apply our high temperature resistant CeramiChrome coating to not just make them eye appealing but to add another heat barrier that keeps the exhaust gas energy moving to your turbo to improve turbo response. No manifold goes out the door without being flow tested to insure that they flow at least 20 Cubic Feet of air per Minute (CFM) more per port.

We do all of this to give you 28-32 more horsepower, .2-.3 more MPG and the peace of mind that you have the most proven, highest flowing, and most reliable manifold on the market.

Plus, the best part is it’s all done here in the USA. Each manifold is proudly cast saying “Made in the USA.”

  • Increase Fuel Mileage .2 -.3 MPG
  • 28 – 32 Horsepower increase
  • Ceramic coating reduces heat & improves air velocity
  • Lower manifold temps 300*F
  • Lower EGT’s 80-100*F
  • Reduce turbo lag
  • No cracking, leaking or warping
  • Improves gasket life
  • 2-year Warranty


  • Replaces OEM# 3682959
  • Cummins 870 ISX Engines ’03-’07
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1 Review

  • 5
    Great manifold

    Posted by Patrick on 2nd Jan 2024

    Very thick compared to stock, shiny and coated to look good for a while. Theoretically there's no reason I would feel any performance increase over 600 hp since the isx stock manifold is rated for that. The butt Dyno feels no difference but no more exhaust leaks and it was $100 more than stock. Quality seems a lot better than stock.

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