Nnbs cat removal

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Dec 6, 2010 | 12:46 PM

#11

ssierra08

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From: Paris, Tx

Quote:

Originally Posted by 08Chevy

You would have seen them at the meet if you showed up lol

We got to justin at 7 and out at 8.

Dec 6, 2010 | 12:55 PM

#12

09sierra6.2

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Quote:

Originally Posted by jeffz0rz

I'm getting the low efficiency on bank 2, not sure if its an o2 or a cat going out. I am getting a rattle so I think the cats are headin south. Read something about some bolt in cat delete y pipe. Can't seem to find it on here, but besides dealing with the rear o2 delete, anything else to know about ? What have some of you done to **** can your cats?

guess if you have a welder just cut it out knock all the inside out and put the cat back in.. will have to tune out the check engine light tho

Dec 7, 2010 | 03:45 PM

#13

BLACKND

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From: Alvin,TX

I've been wanting to buy an extra stock y-pipe, cut the cats out and install it, keep my stock unit for inspection time.

I can't imagine much in the way of power gains, maybe 5 hp tops, I really want to do mine for sound. I'm not going for full performance mods on my truck, just cheap mod gains here and there.

Dec 8, 2010 | 12:08 PM

#14

jeffz0rz

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Anyone know of a bolt in y pipe and cat delete replacement? I've seen them for the early 2000 certain and cameros ect. I just don't want to deal with the cats going out. I'll throw them back on if I ever need to sell her (seriously doubt it)

Dec 8, 2010 | 09:07 PM

#15

BLACKND

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From: Alvin,TX

Haven't seen or heard of any that just bolt up to the stock exhaust manifolds.

Dec 9, 2010 | 02:15 AM

#16

silverado1ss89

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From: LOS ANGELES, CA

Quote:

Originally Posted by L33Z71

Haven't seen or heard of any that just bolt up to the stock exhaust manifolds.

What's ur track time on ur 4.8

Dec 9, 2010 | 09:48 AM

#17

BLACKND

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From: Alvin,TX

Never taken it down the track. Its just a good, fairly quick DD. Maybe one day if I ever get it setup like I'd like and a nice drop.

Dec 9, 2010 | 10:29 AM

#18

Tootall

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From: League City, Tx

I'll buy the cats if you take them off . . .

Dec 9, 2010 | 12:44 PM

#19

carbongmc

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From: Gonzales, La.

On my 09 sierra, I cut off the large rear cat only. it got a little louder, but not anything to turn me away from doing it. i did feel a small amount of power increase in the mid-range so im glad i did it.

Dec 9, 2010 | 12:53 PM

#20

JetBlack98Z

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From: Pearland Tx

Quote:

Originally Posted by carbongmc

The Third cat you mean ? Did you have a check engine light come on yet ?
Sorry to thread jack, but i was just about to add a thread asking this exact question.