High Flow Cats

[GhostKa78]

Hey guys i swapping out the cats in my truck for high flows due to mine just went south... lol i was wondering if i need 3 or only 2? i have 2 cats on the y-pipe that comes down into the collector that is bolted to what appears to another cat but i cant find anywhere that says its a cat or even what it might be. It looks just like a cat but i dont want to end up ordering 2 cats when i end up needed 3. if you guys know what this is let me know thanks

 

[UrbanRedneckKid]

Delete the pre-cats, and run one high-flow after the y-pipe.

That's how it's done, but you'll gain practically nothing but noise.

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