I am about to gut a set of cats, but am considering only gutting the secondary cats. Anyone have experience with this? Do you think it would pass the snif test? What about power gains?

 

You will definatly see a power gain. Im not sure about passing a snif test...

For those wanting gains from getting rid of the cats and passing sniff test I say go for High Flow Cats.

http://www.performancenissanparts.com has High Flow Cats that are really nice. Ive heard them and have seen power gains from them and I am impressed. Im going to get a set eventually.