Attention: TDR Forum Junkies 
Yo Hoot
TDR MEMBER
The CATS are straight through, very thin wall honeycomb. You can actually see straight through it with little obstruction. I'm not kidding when I say very low restriction. My truck doesn't have one from the factory and if it did I would probably have removed it... only because it's "UNCLEAN" :-laf :-laf
