Cutting my cat

[99denali]

Gona be getting my cat cut off soon, did anyone notice a difference in sound or power when getting theirs cut? My yukon has 80k miles on it so im assuming its clogged.

 

[grimm]

Cats will last a pretty long time. My truck has 182K miles with the original cats. At 80k I doubt yours are clogged, but then again, random shit does happen. Anyways, you would most likely notice a difference in sound. It would probably end up sounding more aggressive. As for power, you might gain some high-end at the cost of your low-end. I guess it depends on how you set everything up.

 

[Rebelution]

When I cut off my cats the exhaust got a little louder but now it pops when you let off the gas after revving it up real high. It seems to accelerate faster when I step on it going about 60 or 70.

 

[blackcoffee]

Bad choice on doing that without getting your truck tuned for it. T
If you get it tuned right, you'll rid of any codes and the popping and anything else.

 

[99denali]

Ok thanks for the input, once i get them off and ill see about getting a BBT for it if the little engine light drives me crazy.

 

[nikel]

I thought this was an issue on my 98 hoe. I took off the cats and hooked up a shop vac to gauge the amount of air going through. No change. It is not likely they are clogged unless you are constantly throwing smoke out the tail pipe... and i mean thick smoke; like that kind that would scare most people.

my .02 worth. But on the 98 both cats are extremely high flow.

Forgot to mention I have over 200k on my truck; stock cats.

 

[99denali]

Ok, there probably not clogged but Ive decided Im still going to cut them off.

 

[99_2door]

so the cats are fine......but you're going to cut them off anyway? why

 

[99denali]

just cause i can basically, for a deeper/louder sound and hopefully a tad more power.

 

[99_2door]

well technically you can, but it is a violation of federal law
as for gains....... you're not going to gain anything other than an obnoxiously loud truck that vibrates the shit out of everything inside. been there and its not worth it.