PLM High Flow Performance 400 Cell EPA Metallic Catalytic Converter

8 Reviews

Availability: In stock

Retail Price:   $199.00
Sale Price:   $149.00

Product Code: PLM-CAT-2.5-MET-400

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Price is for one (1) catalytic converter.  If you need two (2), please add 2 to cart.

Introducing the EPA Compliant PLM High-Flow 400-Cell Metallic Catalytic Converter - designed for enhanced exhaust flow, performance, and emissions compliance. Crafted with precision engineering, this converter ensures maximum filtration while optimizing airflow. Experience improved engine efficiency and power delivery, all while meeting EPA standards. Upgrade your exhaust system with confidence, knowing you're investing in quality craftsmanship and environmental responsibility with PLM technology.

When you install one of the PLM header or manifold, it is a good time to also replace your catalytic converter for maximum performance and exhaust flow.

  • EPA compliant catalytic converter
  • Price is for one catalytic converter 
  • OBD-II compliant 48-state legal (Restricted in CA and NY)
  • Metallic metal core, 400 cell
  • Overall length 7"
  • Body diameter 3.0" and 3.5"
  • Body length 4"
  • Available in 2.5" or 3.0" diameter inlet and outlet
  • Easy "cut-and-clamp" or weld-on installation 
  • Stainless steel construction
  • Please check your local law to see if aftermarket catalytic converters are allowed.
  • This catalytic converter is not for OEM factory replacement.
  • Note: Photos shows 2 sizes, 2.5" & 3.0".  Price is for each catalytic converter.
  • Photo note:  The photo shows our high quality metallic core.  The one on the right is more dense at 400 cell per square inch.

Emissions disclosure:  EPA compliant cat does not mean it is emissions legal or will pass your local/state emissions or inspection.  Federal law prohibits the tampering of an emissions control device. Mobile Source Enforcement Memorandum 1A, allows for aftermarket parts to be used in the repair or replacement of emissions control systems, provided the emissions aren't adversely affected. There is no mention or reference to cell density or converter volume dimension.  Our EPA compliant catalytic converter will produce emissions that will meet or exceed the standards set by the EPA.

400 cell vs. 200 cell?

A catalytic converter (CAT) is made of many little cells with high value metals which will take care of oxidizing the gazes that were not fully oxidized in the engine.  A 400 cell cat means there are 400 of these cells per square inch.  As this number goes down, the amount of physical cells decreases therefore generating fewer constraints for the exhaust flows.

We recommend this 400 cell catalytic converter if you want to retain factory-like emissions and have better performance, and in most cases, will not throw a code.

If you want high flow, with the least amount of restriction, we recommend our 200 cell catalytic converters.  See this link here.

Customer Reviews
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Michael M.
United States

Work great.

They fit my 1997 Ford Expedition 4.6 4x4 in place of my stock cats. They toned down my Paradox Signature Series Muffler and ended up with the deep tone I was looking for.

Gerardo P.
United States United States

Good product shipping was fast , Ryan call me to confirm the order.. parts are installed same day they got delivered no complaints

Ashton Z.
United States United States

Awesome !

Build quality is really nice and looks cool. Welded up perfect

Ashton Z.
United States United States


Great build quality and looks really nice!

Saleh M.
United Arab Emirates United Arab Emirates

Perfect solution at a fair price

Since i installed LTH on my M156 E63, its been seriously noisy and the exhaust smelled bad (both main and secondary cats are gone with LTH installation) With police on the hunt for noisy vehicles, i was unable to enjoy driving at all. Until i installed these. Just perfect sound, perfect loudness, and as a bonus the smell is like 90% gone. Recommended!