Best Cat's to put in a offroad y pipe

[Camvill]

Need some cat's for more low end torque i don't have enough backpressure any suggestions

[crainholio]

Magnaflow tiny cats here, installed at Mufflex. No dyno numbers, but on the road course they seem to be a good balance of flow and backpressure. Pulls nicely against heavier LS3 Vettes out of the corners as well as on the long straights.

[JerzLT1]

if you're running any type of cat back you dont need cats for back pressure, it wont make any difference