Berniempb

iTrader: (1)

My SES light came on for a random misfire, turns out my cats are restricted. I'd like to do this as cheap as humanly possible, so I'm planning on gutting my cats and buying used O2 sensors. My state has no inspections, so I'm not concerned about emmissions.

The driver's side cat looks like it unbolts from the rest of the exhaust pretty simply, but what about the passenger side? Does it just slide out of the Y-pipe, or is it welded on and is there no way to get to the inside of it without sawing it off and welding it back on? I cannot weld and do not want to pay someone else to do it.

Also, does anyone know the size of the bolts for the cats? I'm sure mine will break and I'd like to have replacements ready when I do it.

Thanks in advance,
Mike

00badSScamaro

iTrader: (1)

^^^ I'm real interested in the same info!

GR33N GoblinM6

iTrader: (14)

use some PB blaster... its cheap and does the trick for stuck bolts.. mine had never came off in 105k miles... but they came out without a problem..

00badSScamaro

iTrader: (1)

ttt anyone have any info to add please. Thanks.

lgobraves

iTrader: (14)

what are you buying used o2 sensors for?

2K2WS6TA

iTrader: (2)

On the pass side of some years you have to cut the pipe to R&R the cat, later on (I know the 02s have bolts) GM made the pass side like the drivers side where you can easily get at the cats

bichin95redta

Don't gut the cats. All you'll be doing is creating two expansion chambers, which will cause turbulent exhaust flow, and make your car noticeably louder.

PB Blaster IS good stuff. If it doesn't work, and you can't get the cats off, pull the entire y-pipe, and have a shop fab up an off-road y-pipe if you don't feel like dealing with cats anymore. It can't be any more expensive than replacing cats.

98TADRIVER

iTrader: (36)

[QUOTE=bichin95redta]Don't gut the cats. All you'll be doing is creating two expansion chambers, which will cause turbulent exhaust flow, and make your car noticeably louder.

put a pipe thru the cat and weld it to make it unturbulent! lol

orangeapeel

iTrader: (18)

I would leave them alone, but that is just me. I like the straight pipe through them Idea. still looks pleasing to state authorities.

silverlt1ss

unbolt the y-pipe from each manifold and gut it out that way. just make sure you have passenger side turned upside down so all the stuff you hack out doesn't go into the ypip and get stuck. 98 and 99 cars have the removable drivers cat from the y pipe and the passenger cat is part of the ypipe. 2000 and up have both cats removable from the ypipe. i just gutted my girlfiends cats on her 2000 trans am. you'll need manifold to ypipe gaskets. i got mine from gm for 16 bux(both sides). i only did this because she wanted it louder and couldn't afford an ory at the time. so it's only temp. it doens't sound bad. she has a borla and runs it open. she also gained 6 rwhp by doing this and it even still has that flat ypipe in it but i heard that flows just as good as the slp ypipe.

Berniempb

iTrader: (1)

Thank you silverlt1ss, that's exactly what I needed to know.

staringback05

iTrader: (8)

lol on my 96 s10 i took a bat to it, i know that sounds really bad but it shot out some black crap for a bit, then sounded better and actually ran better...BUT i know this isnt a truck sooo i dont know.....just get some headers...and screw the cats